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New Miocene gastropods and scaphopods from Alaqua Creek Valley, Florida ( FGS: Bulletin 12 )
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STATE OF FLORIDA
DEPARTMENT OF CONSERVATION
GEORGE W. DAVIS, Commissioner







GEOLOGICAL BULLETIN No. 12







NEW MIOCENE GASTROPODS AND SCAPHOPODS
FROM ALAQUA CREEK VALLEY, FLORIDA


BY
W. C. MANSFIELD
UNITED STATES GEOLOGICAL SURVEY







Published by
State Board of Conservation
Geological Department
Tallahassee, 1935







AGRI-
CULTURAL
LUBRARY*














published June 7, 1935








LETTER OF TRANSMITTAL


Honorable George W. Davis,
Supervisor of Conservation.
DEAR MR. DAVIS:
Two bulletins dealing with the invertebrate fossils of the
Choctawhatchee formation which is so richly fossiliferous and
well exposed in western Florida have been issued by the
Geological Survey. One of these appeared in 1930 as Bulletin
No. 3 and the other in 1932 as Bulletin No. 8. The field work
incident to the preparation of the latter bulletin gave excellent
opportunity to make additional collections and it was during
this time that the new species described in the manuscript
herewith transmitted were found. Dr. W. C. Mansfield, of the
United States Geological Survey, is the author and the report
comes as a contribution from the Federal Survey to the Florida
Survey, the only expense being that of publication. These
bulletins will form a most complete treatment of the larger
invertebrate fossils of this formation which will prove helpful
especially to students of invertebrate paleontology. It is with
pleasure that acknowledgment is made of the generous co-
operation of the Federal Survey and to Dr. Mansfield for his
thorough and painstaking work. It is recommended that this
supplementary report be printed as Geological Bulletin No. 12.
Very respectfully,
HERMAN GUNTER, Assistant Supervisor,
State Board of Conservation,
Geological Department.

Tallahassee, Florida,
February 11, 1935.









CONTENTS

Page
Introduction .......................................... 7
Description of Species ................................ 15


ILLUSTRATIONS

Plates 1-5. Miocene gastropods and scaphopods of the
Choctawhatchee formation from the Alaqua
Creek Valley...... ....................... 49











NEW MIOCENE GASTROPODS AND SCAPHOPODS
FROM ALAQUA CREEK VALLEY, FLORIDA
By W. C. MANSFIELD'
INTRODUCTION
This paper describes new species of gastropods and scaph-
opods that have been found in the valley of Alaqua Creek
south of DeFuniak Springs, Fla., since the publication of my
paper on "Miocene gastropods and scaphopods of the Choctaw-
hatchee formation of Florida."' Descriptions of the pelecy-
pods and foraminifers from the same beds were included in
bulletins 8 and 9, respectively, of the Florida State Geological
Survey." A sketch map showing the fossil localities in Alaqua
Creek valley is given in Bulletin 8, fig. 1. The types of the
new species are deposited in the U. S. National Museum. A
nearly complete set of named specimens, including many
topotypes, has been deposited with the Florida State Geological
Survey. The plates were made from photographs by Nelson
W. Shupe, retouched by Frances Wieser, both of the U. S.
Geological Survey.
The beds containing these fossils represent the three lower
zones (Yoldia zone, Area zone, and Ecphora zone) of the Choc-
tawhatchee formation, which are discussed in Bulletin 8. The
correlation of these zones is shown in table 1.
The Yoldia zone is represented in the valley of Alaqua Creek
by deposits on the Frazier farm (station 12060, the type local-
ity) and on the Chester Spence farm (station 12718). These
contain Cymatosyrinx vaughanensis, n. sp., Turbonilla sp., Al-
abina sp., Crucibulum constrictum (Conrad), and Dentalium
(Laevidentalium) sp. aff. D. callipeplum Dall.

'Published by permission of the Director of the U. S. Geological Sur-
vey.
'Mansfield, W. C., Florida Geol. Survey Bull. 3, 1930.
'Mansfield, W. C., Miocene pelecypods of the Choctawhatchee forma-
tion of Florida: Florida Geol. Survey Bull. 8, 1932.
Cushman, J. A., and Ponton, G. M., The Foraminifera of the upper,
middle, and part of the lower Miocene of Florida: Florida Geol. Sur-
vey Bull. 9, 1932.


[7]






TABLE 1. CORRELATION OF SOME LATER TERTIARY AND PLEISTOCENE DEPOSITS OF THE ATLANTIC AND GULF COASTAL PLAIN

EUROPEAN NEW MARY- VIRGINIA NORTH SOUTH GEORGIA FLORIDA
VIRGINIA GEORGIA FLORIDA
EQUIVALENT JERSEY LAND CAROLINA CAROLINA

Deposits Deposits Marls on North 0
Z at on Creek 0
M Wailes Yonges
Bluff a Island

Upper Sicilian (?) (?) Deposits on
(Arnian) Myakka River b

SMiddle Astian (?) (?) (?)

Wacca- Croatan Wacca- Limestone of
maw sand to maw Tamiami
Lower Plaisancian fm. to north fm. f Trail c
south Caloosahatchee
marl

a The fossiliferous beds in the Pleistocene not necessarily correlated.
b The fauna included by Dall in the Myakka River fauna may include some Pleistocene.
c Position relative to Caloosahatchee marl not precisely known.
f Beds at the Grove plantation tentatively put in the Waccamaw formation by Cooke; may be older.




TABLE 1. CORRELATION OF SOME LATER TERTIARY AND PLEISTOCENE DEPOSITS OF THE ATLANTIC AND GULF COASTAL PLAIN-Continued


EUROPEAN
EQUIVALENT


Pontian


Sarmatian


Upper













Middle


NEW
JERSEY


MARY-
LAND


(?)


St. Marys
fm.


VIRGINIA


Beds at
Suffolk


0 Beds at
0 Yorktown

Chama-bearing
bed

Zone 1


St. Marys
forma-
tion


Choptank Choptank fm.
fm.


Zone 2


Zonel


NORTH
CAROLINA


Upper


beds


Duplin
marl
to
south


Chama-bearing
bed


Zonel


(?) St. Marys fm. d


(?)


SOUTH
CAROLINA


Duplin
marl


Zone 1
(at
Raysor
Bridge)


GEORGIA


Duplin
marl (at
Porters
Landing)


I


SI I.1 I I CD-I --- -- -


Kirkwood Calvert
fm. fm.


Calvert fm.


Oak Grove
sand e


d Mainly concealed except at low-water stage.
e Exact correlation with the Calvert formation not fully established; may be a little older and equivalent to the Helvetian.


Tortonian
or upper
Vindobonian


FLORIDA


Cancellaria >
zone (upper r
part) z

a Cancellaria P
0 zone (lower
Part)
5 "Aluminous '
o clay"

C. Ecphora
C zone
B O
" Arca zone
. (upper
O part)
Area zone 2
(lower
part)
Yoldia
zone
Shoal River o
fm.









10 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

The Arca zone, typically exposed at Red Bay, Walton Coun-
ty, is represented in the valley of Alaqua Creek by beds on the
Bell farm (stations 12044 and 12045) and on Vaughan Creek
(stations 12046 and 12047). These beds are believed to carry
the earliest fauna of the zone, older than that of the lower of
exposed fossiliferous bed at Red Bay, which contains the latest
fauna of the Arca zone. They contain at least 72 species of
gastropods, 16 of which lived also in the preceding Shoal River
formation, and 2 species of scaphopods. The Arca zone at
Red Bay carries Cylichna sp., Conus alaquainsis n. sp.?, Tur-
ritella gatunensis blountensis n. subsp., Turritella alaquadnsis
vaughanensis n. subsp.?, Crucibulum constrictum (Conrad)?,
Calliostoma sp. and Dentalium attenuatum Say. Six species
in the Arca zone are closely related to or are identical with
species in the Gatun formation of the Canal Zone, the Bowden
marl of Jamaica, or in the Gurabo formation of the Dominican
Republic, as follows:


Species in the Area zone
Terebra alaquaensis laqua n.
subsp.
Pleurotoma (Gemmula) vanin-
geni Brown and Pilsbry (rare)

Marginella vaughanensis n. sp.


Epitonium alaquaense n. sp.

Turritella gatunensis blountensis
n. subsp.

Natica guppyana Toula (rare)


Related foreign species
Terebra gausapata Brown and
Pilsbry, Gatun formation
P. vaningeni Brown and Pilsbry,
Gatun formation
Marginella coniformis Sowerby,
Bowden marl and Gurabo for-
mation
Epitonium aduncum Woodring,
Bowden marl
Turritella gatunensis Conrad, Ga-
tun formation.
Natica guppyana Toula, Gatun
formation.


The Ecphora zone, whose type locality is Alum Bluff on the
Apalachicola River, is represented in the valley of Alaqua
Creek at only one known place-Permenter's farm (station
12048)-at which Oliva sp., Epitonium sp., Turritella cookei
permenteri n. subsp., Crucibulum auriculum (Gmelin) var.,
and Cadulus blountense n. sp.? have been collected
The new species that are common to the Shoal River forma-
tion and to the Choctawhatchee formation have been described
in a manuscript by Dr. Julia Gardner and are not included in





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 11

this report. They are marked by an asterisk in the following
list.
The following list shows the geologic range of the gastro-
pods and scaphopods that have been found in the valley of
Alaqua Creek. Those species that are followed by the letter
C, occur in the Cancellaria zone; by E, in the Ecphora zone; by
A, in the Area zone; by Y, in the Yoldia zone; by S, in the Shoal
River formation; and by R, in the Recent fauna.

RANGE OF SPECIES
Gastropoda
1. Acteon species (immature), A.
2. Acteon hamadryados Maury, A (var.), S.
3. *Acteocina species, A, S.
4. *Acteocina species, A. S. Near A. myremecoon Dall
(Duplin)
5. *Cylichna species, A, S.
6. *Cylichnina species, ?C, A, S.
7. Volvula species, A, ?S. Cf. V. oxytata Bush, Recent.
8. Abderospira species, A, ?S.
9. Ringicula blountensis n. sp., A.
10. Terebra (Strioterebrum) alaquaensis n. sp., A.
11. Terebra (Strioterebrum) alaquaensis laqua n. subsp., A.
12. Terebra (Strioterebrum) alaquaensis ulaqua n. subsp.,
A.
13. Terebra (Strioterebrum) vaughanensis n. sp., A.
14. Terebra (Strioterebrum) blountensis n. sp., A.
15. Conus alaquaensis n. sp., A.
16. Conus laqua n. sp., A.
17. Conus vaughanensis n. sp., A.
18. Conus waltonensis blountensis n. subsp., A.
19. Conus aff. C. proteus Hwass, A.
20. "Pleurotoma (Gemmula)" vaningeni Brown and Pils-
bury, A (rare), S.
21. Polystira alaquaensis n. sp., A.
22. Crassispira blountensis n. sp., A.
23. Clathrodrillia? laqua n. sp., A. Aff. Duplin marl (upper
Miocene) form.
24. Cymatosyrinx vaughanensis n. sp., Y. A.
25. Agladrillia uquala n. sp., A.
26. *Ithycythara species, A, S.





12 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

27. Glyphostoma macneili n. sp., A.
28. Cancellaria (Cancellaria) laqua n. sp., A.
29. Cancellaria (Narona) blountiana n. sp., A.
30. Cancellaria (Narona) agria uaquala n. subsp., A.
31. Oliva species (fragment), A. E.
32. Olivella mutica (Say) C, E, A, R.
33. Marginella (Leptegouana) vaughanensis n. sp., A.
34. Marginella (Leptegouana) blountensis n. sp., A.
35. *Marginella (Serrata) species, A (var.?), S.
36. Marginella (Serrata) aureocincta Stearns, C. A. R.
37. Cypraeolina lacrimula Gould, C, A, ?S, R. Same form
as at Petersburg, Va.
38. Mitra (Tiara) blountensis n. sp., A. Aff. upper Miocene
species.
39. Vexillum (Uromitra) alaquaense n. sp., A.
40. Fusinus alaquaensis n. sp., A. Aff. burnsii Dall (upper
Miocene).
41. Busycon propecoronatum n. sp., A.
42. Busycon blountense n. sp., A.
43. Busycon montforti Aldrich, ?C, A, S, =?B. maximum ra-
pum (Heilprin).
44. *Busycon species, A. S. Close to B. fusiforme, St. Marys
formation.
45. Latirus waltonensis n. sp., A.
46. Neptunea? alaquaensis n. sp., A.
47. Phos blountanus n. sp., A.
48. Phos blountanus laquanus n. subsp., A.
49. *Alectrion species, A. S. Group of A. peralta Conrad,
St. Marys formation.
50. *Alectrion species, A. S.
51. Alectrion blountensis n. sp., A.
52. Mitrella communis laqua n. subsp., A.
53. Anachis (Costoanachis) alaquaensis n. sp., A.
54. Anachis (Costoanachis) vaughanensis n. sp., A.
55. *Typhis species ?A (rare), S.
56. Typhis harrisi waltonensis n. subsp., A.
57. Urosalpinx? vaughanensis n. sp., A.
58. Muricidea? alaquaensis n. sp., A.
59. Murex, 2 species? indent., A.
60. Epitonium alaqua8nse n. sp., A. Aff. E. aduncum
Woodring (Bowden marl)
61. Epitonium species (fragment), E.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 13

62. *Melanella species ?A, S.
63. Strombiformis species, not determined, A.
64. Pyramidella species, not determined, A.
65. Turbonilla, 2 or more species, A, Y.
66. Semicassis (Tylocassis) inflata waltonensis n. subsp., A.
67. Sconsia aff. S. striata Lamarck, A.
68. Triphora species, A.
69. Alabina, one or more species, E, A, Y.
70. Serpulorbis granifera Say?, E.
71. Turritella gatunensis blountensis n. subsp., A, ?S.
72. Turritella alaquainsis n. sp., A.
73. Turritella alaquaensis vaughanensis n. subsp., A.
74. Turritella cookei permenteri n. subsp., E.
75. *Architectonica species, A. S. Aff. A. granulata Lamarck.
76. Fossarus aff. F. dalli Whitfield, A.
77. Crepidula plana Say, A, S.
78. Crepidula fornicata (Linnaeus), A, S.
79. Crucibulum auriculum (Gmelin) var.?, E.
80. Crucibulum auriculum (Gmelin), A.
81. Crucibulum constrictum (Conrad), A, Y, ?S.
82. Crucibulum cf. C. multilinatum (Conrad), A.
83. Natica guppyana Toula, A (one specimen), S.
84. Natica canrena (Linnaeus), C, A.
85. Natica canrena (Linnaeus) ?, A.
86. Polinices coensis Dall, C, A. Smaller in A than C.
87. Polinices (Euspira) waltonensis n. sp., A.
88. Polinices (Euspira) propeinternus n. sp., A.
89. Polinices duplicatus (Say), C, A, R.
90. Tectonatica pusilla (Say), C, A, R. Reported middle
Miocene to Recent.
91. Sinum aff. S. fragilum Conrad, A. The type of S. fragi-
lum came from St. Marys formation, Md.
92. Calliostoma species (young), A.
93. Molleria cf. M. duplinensis parva Mansfield, A.
94. Solariella laqua n. sp., A.
95. Vitrinella blountana n. sp., A.
96. Teinostoma cf. T. nanum umbilicatum (H. C. Lea), A.
97. Circulus trilex (Bush), A, R.
Scaphopoda:
98. Dentalium attenuatum Say, C, E, A.
99. Dentalium aff. D. callipeplum Dall, Y, A.
100. Cadulus blountense n. sp., A. ?E.






14 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

The fossil shells described in this report were collected at
the places listed below. The numbers in the list are the station
numbers used by the U. S. Geological Survey for collections
deposited by it in the Division of Mollusks of the U. S. Nation-
al Museum.
12718. Chester Spence farm (N.E.1/4 of N.E.1, sec. 17, T.2N.,
R.19 W.). Fossils collected directly above a horizontal
oxidized line, which is about 5 feet above the base
of the bluff, and in a layer 2 or 3 feet higher up. W. C.
Mansfield and G. M. Ponton, collectors, 1932 (Yoldia
zone).
12060. Frazier's old farm (formerly Spencer farm), one-fourth
mile southeast of center of sec. 18, T.2N.,R.19 W. Fos-
sils obtained at a dripping spring which heads a small
branch flowing into Alaqua Creek. W. C. Mansfield
and G. M. Ponton, collectors, 1930-31 (type locality of
Yoldia zone).
12044. On the Steel Chuch road at head of a small branch flow-
ing into Sconier's Mill Creek, on the rear of the G. H.
Bell farm (formerly the G. R. Spencer farm) 7.1 miles
south-southwest of DeFuniak Springs (N.E.14, sec. 29,T.
2N.,R.19W) W. C. Mansfield and G. M. Ponton, collec-
tors, 1930 (Arca zone, lower part).
12045. At head of small branch flowing into Sconier's Mill
Creek on the G. H. Bell farm, about one-fourth mile
south of Station 12044 (about center sec. 29, T.2N., R.19
W.). W. C. Mansfield and G. M. Ponton, collectors, 1930
(Arca zone, lower part).
12046. Vaughan Creek (locally called Blounts Creek), about
3 miles from its junction with Alaqua Creek on the old
farm of Mrs. F. H. Davis, about 61/2 miles nearly south
of DeFuniak Springs (sec.27,T.2 N.,R.19 W.). Fossils
obtained a short distance below the head of a shallow
gorge that cuts through the marl. Elevation of shell
bed, 93 feet above sea level. W. C. Mansfield and G.
M. Ponton, collectors, 1930-31 (Arca zone, lower part).
12047. Vaughan Creek (locally called Blounts Creek), from a
few yards below an old mill to half a mile below it, and
about 1/, to 2 miles from the creek's junction with Ala-
qua Creek, in sec. 28,T.2 N.,R.19 W (J. W. Fahrenholz's
old farm). Elevation of shell bed at water's level at





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 15

lower end of creek, 76 feet. W. C. Mansfield and G. M.
Ponton, collectors, 1930 (Area zone, lower part).
12048. In an old road cut in the east bank of Alaqua Creek
on P. Permenter's old farm, about 10 miles nearly south
of De Funiak Springs, in sec. 17, T.1 N.,R.19 W. Shells
collected at altitude of 53 feet above sea level. W. C.
Mansfield and G. M. Ponton, collectors, 1930 (Ecphora
zone).
12049. E. Gomillion's place, about half a mile east of Red Bay.
W. C. Mansfield and G. M. Ponton, collectors, 1930
(Area zone, upper part).
12050. Lower bed on Jim Kennedy Branch, about one mile east
of Red Bay. W. C. Mansfield and G. M. Ponton, collec-
tors, 1930-32 (Area zone, upper part).

DESCRIPTIONS OF SPECIES
Class GASTROPODA
Family RINGICULIDAE
Genus RINGICULA Deshayes, 1838
Ringicula blountensis Mansfield, n. sp.
Plate 1, Figure 13
Shell small, solid, ovate and consisting of about 2 nuclear
and 2 post-nuclear whorls. Nuclear whorls smooth,-initial
turn very small, following turn much larger. Post-nuclear
whorls marked with spiral striae forming between these striae
very narrow flat bands. Body whorl much larger than pre-
ceding and rounded in outline. Outer lip thick with upper
third of margin depressed. Inner lip callus bearing three
widely separate folds, the upper one situated at the posterior
third and the anterior one forming the border of the anterior
canal.
The holotype (U.S.N.M. Cat.No.373111) measures: Length,
2.4 mm.; diameter 1.6 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Common at
the type locality.
Family TEREBRIDAE
Genus TEREBRA BruguiBre, 1789
Subgenus STRIOTEREBRUM Sacco, 1891
Terebra (Strioterebrum) alaquaensis Mansfield, n. sp.
Plate 1, Figure 1
Shell rather slender, solid, posterior extremity moderately
acute, axial and spiral sculpture about the same strength, 12






16 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

whorls remaining on holotype; tip lost. Subsutural band about
one-fourth width of whorl, restricted in front by a moderately
deep sulcus. Ribs about 20 in number, offset on adjoining
whorls, weakly arcuate, continuous across the whorl and about
the same width as intercostal spaces. Spiral sculpture on spire
of narrow, equal sized, regularly spaced bands separated by
interspaces of equal width; these number 4 below the sulcus on
the holotype and 5 on some other specimens. The ribs and
spirals on the body whorl extend to the siphonal fasciole.
Siphonal fasciole bounded posteriorly by a sharp keel and in
front by growth lines. Columella weakly biplicate.
The holotype (U.S.N.M.Cat.No.373112) measures: Length,
25 mm.; diameter, 5 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone; known only
at the type locality.

Terebra (Strioterebrum) alaquaensis laqua Mansfield, n. subsp.
Plate 1, Figure 2
Shell rather slender, solid, posterior extremity moderately
acute and consisting of 2 nuclear and 9 post-nuclear whorls.
Subsutural band wide and constricted in front by a rather
deep and narrow sulcus. Sutural area depressed. Axials
about 19 on each whorl, slightly offset on adjoining whorls,
weakly arcuate, about as wide as interspaces, weakly nodu-
lous at the intersection with the spirals. The spiral in front
of the subsutural band is rather wide; the following four are
narrow and extend forward to the suture. Spirals and axials
on the body whorl extend to the base. Siphonal fasciole
bounded on the upper margin by a sharp keel and anteriorly
by coarse growth lines. Columella weakly biplicate.
The holotype (U. S. N. M. Cat. No. 373113) measures: Length
27 mm.; diameter, 7 mm.
Terebra alaquaensis laqua is closely related to Terebra gau.
sapata Brown and Pilsbry from Mt. Hope, Canal Zone, which
differs from T. alaquaensis laqua in having a stronger spiral
below the subsutral band.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone; known only
at the type locality.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 17

Terebra (Strioterebrum) alaquaensis ulaqua Mansfield, n. subsp.
Plate 1, Figure 3
Shell of medium size, moderately slender, somewhat acute
at posterior extremity and consisting of 2 nuclear and 11 post-
nuclear whorls. Subsutral band wide and constricted anter-
iorly by a moderately deep sulcus. Axials on contiguous
whorls offset. Suture weakly depressed. Axials about 20,
slightly narrower than interspaces, continuous across the whorl.
Spiral sculpture of (2 on early whorls and 3 on later whorls
between the sulcus and base) narrow, equally spaced bands.
Very fine spiral threads overrun the whorls, being more dis-
tinct in the intercostal valleys. Siphonal fasciole bounded be-
hind by a sharp keel. Columella weakly biplicate.
The holotype (U.S.N.M.Cat.No. 373114) measures: Length,
261/ mm.; diameter, 6 mm.
Terebra alaquaensis ulaqua differs from Terebra alaquadn-
sis and Terebra alaquaensis laqua in having fewer spirals be-
tween the sulcus and the base of the whorl; however, the three
forms are closely related.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone; known only
at the type locality.
Terebra (Strioterebrum) vaughanensis Mansfield, n. sp.
Plate 1, Figure 4
Shell small, very slender, axial sculpture much stronger than
spiral. Nucleus on holotype lost but on a small paratype it
consists of 3 small, smooth, rounded whorls. Suture weakly
depressed. Subsutral band about one-third width of whorl
and constricted anteriorly by a deep sulcus. Axials about 15,
nearly vertical on contiguous whorls, retractive over poster-
ior half of whorl and protractive below. Spiral sculpture of a
very faint line adjacent to and below the sulcus and fine striae
on the anterior half of the whorl forming between them very
narrow flat bands. Axials and spirals on the body whorl ex-
tend to the base. Columella with 2 strong plications.
The holotype (U.S.N.M.Cat.No.373115) measures: Length,
16 mm.; diameter, 312 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone; known only
at the type locality.





18 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Terebra (Strioterebrum) blountensis Mansfield, n. sp.
Plate 1, Figure 5
Shell rather small, moderately slender, with gradually en-
larging whorls. Sutural band about one-third width of whorl,
constricted in front by a deep sulcus. Axials 16, strong, nar-
rower than interspaces, slightly offset on contiguous whorls,
weakly retractive on upper half of whorl and protractive be-
low. Spiral sculpture on spire whorls of 2 impressed lines be-
low the sulcus, one being at the upper third and the other at
the lower third. There are 8 impressed spiral lines on the
anterior half of the body whorl. Columella with 2 strong pli-
cations.
The holotype (U.S.N.M.Cat.No.373116) measures: Length,
26.5 mm.; diameter, 51/2 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone; known only
at the type locality.

Family CONIDAE
Genus CONUS Linnaeus 1758
Conus alaquaensis Mansfield, n. sp.
Plate 1, Figure 7
Shell rather small, thin, moderately slender, consisting of about
9 whorls in all. Spire turrited, weakly concave and constituting
about one-third shell length. Protoconch small, rounded,
apparently smooth and apically depressed. Following 5 post-
nuclear whorls strongly carinated above the suture; later
whorls less strongly carinated, the suture falling upon the peri-
phery of the whorl. Spire whorls marked with obscure spirals
and curved growth lines. Face of body whorl and siphonal
fasciole sculptured with 19 moderately narrow, spiral bands
separated by narrower interspaces. These bands extend up-
ward nearly to the carinated shoulder. The interspaces on the
back of the body whorl are either very narrow or carry a spir-
al thread. Some of the spiral bands are ornamented with a
few granules. Columella with a weak depression at the lower
border. Canal anteriorly deflected to the left and backward.
The holotype (U.S.N.M.Cat.No.373117) measures: Length
33.3 mm.; greatest diameter, 13.5 mm.; length of spire, 9.6 mm.
Conus harveyensis Mansfield, an upper Miocene species, is
related to the new species, differing from the latter in having a
stouter shell and wider spiral bands on the body whorl.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 19

Type locality: Station 12046. Vaughan Creek, upper local-
ity, Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type lo-
cality). A poorly preserved mold at Station 12049, Red Bay,
Walton County, may belong to the new species.
Conus laqua Mansfield, n. sp.
Plate 1, Figure 6
Shell small, subbiconic, rather stout and consisting of 10
whorls in all. Spire turrited, uniformly conic and constituting
about one-third of shell length. Spire whorls medially de-
pressed and marked with obscure spiral lines and strong curv-
ed growth lines. Front and back of body whorl similarly
sculptured with 21 strong, nearly smooth, concentric bands
with slightly narrower interspaces. The interspaces are cross-
ed by fine axial threadlets.
The holotype (U. S. N. M. Cat. No. 373118) measures: Length,
.24 mm.; greatest diameter, 10.8 mm. Length of spire, 9 mm.
Conus multiliratus gaza Johnson and Pilsbry from the mid-
dle Miocene of Dominican Republic, Panama and Colombia,
S. A., shows some relationship to C. laqua n. sp. but differs
from it in having a more tapering body whorl. Conus harvey-
ensis Mansfield, an upper Miocene species, though closely re-
lated, has a relatively narrower shell and wider spiral bands.
The new species appears to be a precursor of C. pygmaeus
Reeve, a living species, differing mainly in having wider-
spaced concentric bands.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
locality). Station 12044, Bell place, upper locality, Walton
County; Station 12045, Bell place, lower locality. Rare at all
localities.
Conus waltonensis blountensis Mansfield, n. subsp.
Plate 1, Figure 9
Shell small, rather stout with 7 or 8 whorls in all. Spire tur-
rited, evenly and broadly conic and constitutes about one-
fourth of shell length. Spire whorls carinated at the lower
shoulder and depressed medially. Body whorl broad above
and narrow below and sculptured, from the upper third to the
siphonal fasciole, with about 10 rather wide spiral bands,
which are ornamented with a few granules. Siphonal fasciole





20 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

weakly elevated and marked with 5 or 6 closely spaced and
narrow spiral bands.
The holotype (U.S.N.M.Cat.No.373119) measures: Length,
17.2 mm.; greatest diameter, 9.2 mm.; Length of spire, 5 mm.
Conus waltonensis blountensis, n. subsp. differs from Conus
waltonensis Aldrich, a species from the Shoal River formation
in having a relatively higher and more evenly conic spire;
broader body whorl above and more constricted below; a
stronger carina at the shoulder of the body whorl; and in the
absence of granules on the upper third of the body whorl.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County, Fla.
(type locality). Known only from the type locality.

Conus vaughanensis Mansfield, n. sp.
Plate 1, Figure 8
Shell of moderate size, rather stout and solid, with about 9
whorls in all. Spire turrited, weakly acuminate in the earlier
whorls and constituting about one-third shell length. Whorls
medially depressed and marked with weak concentric threads
and curved growth lines. Anterior canal broken off. Body
whorl sculptured only at anterior end with 5 or more undulat-
ing raised concentric lines.
The holotype (U.S.N.M.Cat.No.373120) measures: Length, 50
mm.; greatest diameter, 27.5 mm.
Conus imitator Brown and Pilsbry, a middle Miocene species
from the Gatun formation, Panama Canal Zone, is related to
C. vaughanensis, n. sp. but differs from it in having a more
slender shell, more acuminate early spire and stronger sculp-
ture on the body whorl.
Conus diluvianus Green, a species confined to the St. Marys
formation of Maryland and Virginia, shows close relationship
to the new species but differs from the latter in having a shal-
lower depression in the anal fasciole and fewer whorls.
Conus delessertii Recluz, a living species ranging from Cape
Hatteras to the Florida Keys is also closely related to the new
species but differs from it in having a slimmer shell and a shal-
lower anal fasciole.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality, Walton County, Florida
(type locality); Station 12044, Bell Place, upper locality, Wal-
ton County (one fragment.)





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 21

Conus aff. C. proteus Hwass
Plate 1, Figure 12
A large shell with only the spire preserved was collected at
Station 12046, Vaughan Creek, upper locality, Walton County.
This shell is related to Conus proteus Hwass. The specific de-
termination of this shell must await the collection of better
specimens. The spire when compared with that of C. proteus
has less depressed whorls medially. The spire of C. apium
Woodring, a species from the Bowden marl of Jamaica, is
somewhat similar to the unnamed Florida species.
The figured specimen (U.S.N.M.Cat.No.373121) measures:
Diameter of spire, 37.5 mm.

Family TURRIDAE
Genus POLYSTIRA Woodring, 1928
Polystira alaquainsis Mansfield, n. sp.
Plate 1, Figure 14
Shell large, fusiform, moderately slender, prominently spir-
ally sculptured and consisting of about 15 whorls in all. Spire
high, weakly turrited with uniformly enlarging whorls. Su-
ture appressed against preceding spiral. Nuclear whorls 4;
apical turn very small; following two whorls larger, rounded
and smooth; fourth whorl sculptured with fine axials. The
sculpture of the first post-nuclear whorl consists of 2 spirals,
the second or medial one is the stronger and on the later whorls
forms the periphery; on the fourth whorl another spiral ap-
pears at base of the whorl and in ascending the spire becomes
equal in strength to the subsutral spiral. The sculpture of the
penultimate whorl is composed of three raised nearly equally-
spaced, primary spirals or keels; the medial one is a little
stronger and is situated at the periphery of the whorl; two
secondary spirals or threads lie above the posterior primary
and 3 below the anterior primary. Fine axials connect the pri-
mary spirals; those above the peripheral keel are retractive and
those below protractive. The sculpture on the body whorl,
from the suture forward to the base, consists of 8 similar pri-
mary, concentric keels intercalated with 3 or 4 secondary
threads. Canal long, straight above and reflected at the extre-
mity and sculptured with primary and secondary spirals.
Aperture wide above and narrow and linear below.
The holotype (U.S.N.M.Cat.No.373122) measures: Length,
49 mm.; greatest diameter, 14 mm.





22 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Polystira barretti (Guppy) from the Bowden marl of Ja-
maica, has a much stronger peripheral keel and a larger nu-
cleus than the new species.
Polystira haitensis (Sowerby), a species reported from the
Cercado and Gurabo formations of the Dominican Republic,
also has a larger nucleus.
A species described in manuscript by Gardner and occurring
in the Shoal River formation of Florida appears to be the an-
cestor of the new species described in this paper. Both have
similar nuclei but the Shoal River species has a much stronger
peripheral keel and fewer primary concentric spirals on the
body whorl.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality (type and only locality).

Genus CRASSISPIRA Swainson, 1840
Crassispira blountensis Mansfield, n. sp.
Plate 1, Figure 11
Shell of moderate size, fusiform, turrited, with 6 remaining
whorls, early whorls decollate. Whorls weakly inflated, an-
terior ones more so than posterior, constricted at the suture.
Axial sculpture stronger than spiral. Suture rather closely ap-
pressed, wavy in conformity with the contour of the axials and
marginally bordered by a weak thread. Anal fasciole wide,
situated at upper fourth, marked by 3 or 4 spiral threads,
bounded behind by a spiral cord and in front by a ribbed shoul-
der. Axials (17 on the penultimate whorl) moderately strong
and sharp, weakly protractive and extending from the shoul-
der of the anal fasciole forward to the suture. Sculpture on
the spire whorls below the anal fasciole consisting of 4 to 5
faintly spirally striate bands, weakly nodulous with the axials
and separated by narrower spaces. Spiral bands on the peri-
phery of the body whorl are intercalated with 1 or 2 spiral
threads and those on the base and canal with 3 or 4. Siphonal
fasciole strong; a small chink is located between the inner lip
and lower end of the columella.
The holotype (U. S. N. M. Cat. No. 373123) measures: Length,
28 mm.; greatest diameter, 8.5 mm.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only locality).





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 23

Genus CLATHRODRILLIA Dall, 1918
Clathrodrillia? laqua Mansfield, n. sp.
Plate 2, Figure 6
Shell small, solid, high-spired, moderately slender; axial
sculpture stronger than spiral; body whorl and spire about the
same length and composed of about 8 whorls in all. Suture
closely appressed and undulating. Anal fasciole wide and
slightly depressed. First nuclear whorl small, rounded, smooth;
following whorl larger, rounded and sculptured with about 8
spiral threadlets and faint axials forming a faint reticulate
ornamentation; following whorls sculptured with stronger,
wider-spaced axials and incised spirals on the lower half of
the whorl. The penultimate whorl has 8 moderately strong,
rounded and widely-spaced axials, which are strongly de-
veloped on the lower half of the whorl and very weakly de-
veloped on the upper half. Whole surface of shell sculptured
with incised spirals forming narrow, flat bands, which are
stronger on the periphery. These bands are very narrow and
alternate with spiral threadlets on the basal slope of the body
whorl. Anal notch wide, very deep, the upper margin being a
short distance below the suture. Pillar short; anterior siphonal
canal wide and dorsally reflected.
The holotype (U. S. N. M. Cat. No. 373124) measures: Length,
10.5 mm.; greatest diameter, 3 mm.
Clathrodrillia? laqua is related to an undescribed species
from the Duplin marl at the Natural Well, North Carolina.
The new species is a descendent of a species from the Shoal
River formation described in manuscript by Gardner. It dif-
fers from the Shoal River form in having fewer and weaker
axials.
Occurrence: Upper middle Miocene, Arca zone. Station
12044, Bell place, upper locality, Walton County (type local-
ity); Station 12046, Vaughan Creek, upper locality, Walton
County.
Genus CYMATOSYRINX Dall, 1889
Cymatosyrinx vaughanensis Mansfield, n. sp.
Plate 2, Figures 1, 2
Shell of moderate size, rather stout, mainly axially sculp-
tured, with about 11 whorls. Suture appressed and wavy.
Whorls turrited and inflated. Anal fasciole rather wide, oc-
cupying the upper third and gradually ascending anteriorly.
First nuclear whorl globular, smooth and small; second nu-





24 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

clear whorl less rounded and faintly marked by axials. Fol-
lowing whorls weakly depressed in the upper half and axially
sculptured in the lower half, weak at first but becoming strong-
er in ascending the whorl. Penultimate whorl with 10 axials,
which are very weak in the anal fasciole but do not quite
reach the posterior suture. On the basal whorl the axials ter-
minate at the base except 2 or 3 in front that extend nearly to
the siphonal fasciole. The surface of the shell is marked with
faint, curved growth lines, which are retractive over the anal
fasciole and protractive below. Siphonal fasciole well devel-
oped. Anal sinus deep; upper margin one millimeter below
the suture. Margin of outer lip thin and weakly arched. In-
ner lip smooth and calloused. Anterior canal short, wide and
terminally turned to the right and backward.
The holotype (U. S. N. M. Cat. No. 373125) measures: Length,
22 mm.; greatest diameter, 7 mm.
The new species is a descendant of a species from the Shoal
River formation of Florida described in manuscript by Gard-
ner, but is a slimmer shell, with one more rib and with weaker
axials on the early whorl than the Shoal River form. It is also
closely related to Cymatosyrinx limatula (Conrad), a species
reported throughout the Miocene Chesapeake group of Mary-
land. It appears to be more closely related to the form in the
St. Marys formation than to those in the Calvert or the Chop-
tank formation.
Occurrence: Upper middle Miocene: Arca zone,-Station
12046, Vaughan Creek, upper locality, Walton County (type
locality); Station 12044 Bell place, upper locality, Walton
County (one specimen). Yoldia zone,-Station 12718, upper
bed at Chester Spence farm, Walton County (one poor speci-
men).
Genus AGLADRILLIA Woodring, 1928
Agladrillia uquala Mansfield, n. sp.
Plate 1, Figure 10
Shell small, moderately slender, with a high spire, short
canal, and with 8 remaining whorls. Nucleus decollate. Whorls
weakly inflated. Suture shallow. Axial sculpture consisting
of about 14 offset, strong ribs, extending from suture to suture.
Anal fasciole scarcely distinguishable on the spire whorls but
better defined by a narrow band on the body whorl. Axials
not strongly developed below the base on the body whorl. Spi-
ral sculpture on the spire whorls consisting of 5 or 6 raised,





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 25

smooth, narrow bands, separated by narrower spaces. Margin
of outer lip broken. Inner lip with a smooth and heavy cal-
lus. Anterior canal short.
The holotype (U.S.N.M.Cat.No.373126) measures: Length,
14 mm.; greatest diameter, 4.5 mm.
Agladrillia callothyra Woodring a species from the Bowden
marl of Jamaica, is much more constricted at the suture than
Agladrillia uquala. "Drillia" foveolata Pilsbry and Johnson,
Miocene, Dominican Republic, judging from the illustration,
is closely related to A. uquala but appears to have fewer axials
on the penultimate whorl than the new species.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
locality).

Genus GLYPHOSTOMA Gabb, 1873
Glyphostoma macneili Mansfield, n. sp.
Plate 2, Figure 3
Shell rather large, moderately slender, both axially and spir-
ally sculptured, with a long spire and canal; nuclear whorls
decollate. Suture appressed and wavy. Anal fasciole wide, as-
cending forward from the suture. Whorls turrited and uni-
formly expanding. Penultimate whorl with 10 strong, round-
ed protractive axials, extending from the lower margin of the
anal fasciole forward to the suture and intercalated by round-
bottomed valleys about the same width as the ribs. Body
whorl with about 20 axials, which extend nearly to the siphon-
al fasciole. Spiral sculpture of the early whorls consisting
of 2 primary threads situated near the upper and lower extre-
mity of each rib. Penultimate whorl with a fine secondary
thread between the primaries and one at the upper shoulder
and another at the base of the whorl. Anal fasciole marked
with 2 or 3 obscure spiral threads and by curved axials on the
upper half. Body whorl and canal with 20 moderately coarse
spiral threads which are weakly nodulous at the intersections
with the axials. A wider interspiral space is present on the
body whorl slightly below the periphery Whole surface of
the shell reveals under strong magnification a granulose or-
namentation. Anal sinus rather deep and wide and separated
from the parietal wall by a callus. Outer lip with a thin un-
dulating margin and provided behind with a strong varix and
within with transverse lirae, which overrun an elevated cord
that extends parallel with the lip margin. Columella with





26 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

about 30 denticles. Anterior canal long and termnially turned
to the left and backward.
The holotype (U. S. N. M. Cat. No. 373127) measures: Length,
24 mm.; greatest diameter, 7 mm.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only known locality).
The species is named in honor of F. Stearns MacNeil of the
U. S. Geological Survey.

Family CANCELLARIDAE
Genus CANCELLARIA Lamarck, 1799
Subgenus Cancellaria s.s.
Cancellaria (Cancellaria) laqua Mansfield, n. sp.
Plate 2, Figure 5

Shell small, solid, ovate, axially and spirally sculptured and
consisting of 2 nuclear and 31/2 post-nuclear whorls. Suture
shallow and grooved. Nuclear whorls rounded, smooth, ini-
tial turn minute. Umbilicus rather large, roughed by growth
lines. Post-nuclear whorls turrited, inflated, rapidly enlarg-
ing. Axial and spiral sculpture about the same strength and
form a reticulate ornamentation. Both axial and spiral sculp-
ture begin at the same place on the first post-nuclear whorl.
On the second post-nuclear whorl, there are 4 spiral threads,
the posterior thread being doubled. Body whorl with 14 spi-
rals, 3 of which overrun the siphonal fasciole, and about 30 re-
tractive axials. Outer lip within with 7 sharp lirae, which are
strongest posteriorly and marginally. Columella triplicate,
the upper plication much stronger than the lower two. A small
denticle lies midway between the posterior and the second pli-
cation.
The holotype (U. S. N. M. Cat. No. 373128) measures: Length,
13.3 mm.; diameter, 9 mm.
Cancellaria reticulata leonensis Mansfield, an upper Mio-
cene Florida species, has a less expanding early whorl than
the new species.
Occurrence: Upper middle Miocene, Area zone, station 12,-
046, Vaughan Creek, upper locality, Walton County, Fla. Type
and only locality.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 27

Subgenus NARONA H. and A. Adams, 1853
Cancellaria (Narona) blountiana Mansfield, n. sp.
Plate 2, Figure 4

Shell small, turrited, slender, axial sculpture stronger than
spiral, with 2 nuclear and 4 post-nuclear whorls. Nuclear
whorls smooth, naticoid, initial turn very small, succeeding
turn much larger. Post-nuclear whorls constricted at the
suture, nearly flat below and gently sloping anteriorly from
the prominent upper shoulder. First post-nuclear whorl
sculptured with fine spirals and stronger axials. Penultimate
whorl sculptured with 5 spirals on the posterior slope of the
shoulder and 6 similar narrow bands at and below the
shoulder. Base of body whorl with an occasional inter-
calating thread between the bands. Penultimate whorl with
12 axials which are weaker and more strongly retractive on
the posterior slope of the shoulder than below the shoulder.
Aperture ovate. Anterior canal short and rather narrow.
Outer lip within marked with 12 short and small denticles.
Columella provided with 2 plications of about equal strength.
The holotype (U.S.N.M.Cat.No.373129) measures: Length,
15 mm.; diameter, 9 mm.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, (type and only locality).

Cancellaria (Narona) agria uaquala, n. subsp.
Plate 2, Figures 7, 8

Shell small, slender, turrited; axial sculpture stronger than
spiral; with 2 nuclear and 4 post-nuclear whorls. Nuclear
whorls, smooth, naticoid; initial turn very small, succeeding
whorl much larger. The sculpture on the first post-nuclear
whorl is initiated with both axials and spirals. First and se-
cond post-nuclear whorls with 3 spirals situated at the peri-
phery; later whorls with about 6 spirals, 2 weaker spirals on
the posterior slope of the shoulder and 4 stronger on the shoul-
der and anterior part. Body whorl with about 17 spirals,-6 of
these being on the siphonal fasciole. Penultimate whorl ax-
ially sculptured with 9 strong, weakly retractive ribs extend-
ing from suture to suture. Outer lip margin broken; sculptur-
ed within with 8 sharp lirae situated far within the aperture.
Columella with 2 oblique plications, the upper one being the
stronger.






28 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

The holotype (U. S. N. M. Cat. No. 373130) measures: Length,
14 mm.; diameter, 9.3 mm.
Cancellaria agria Mansfield, a species occurring in upper
Miocene of Florida (Ecphora and Cancellaria zones) is closely
related to Cancellaria agria uaquala, n. subsp., but differs from
it in having stronger axials and spirals.
Occurrence: Upper middle Miocene, Arca zone; Station
12046, Vaughan Creek, upper locality, Walton County, (type
and only locality).

Olivella ochlockoneensis Mansfield, new name
1930. Olivella jacksonensis Mansfield, Florida Geol. Survey Bull. 3, p.
53, pl. 4, fig. 6.
Not Olivella jacksonensis Cooke, Washington Acad. Sci. Jour., vol. 16,
p. 134, fig. 5.
Type locality: Station 3423, lower upper Miocene bed at
Jackson Bluff, Leon County, Florida.
I take this opportunity to give a new name to this species
although the species is not known from the valley of Alaqua
Creek.
Family MARGINELLIDAE
Genus MARGINELLA Lamarck, 1799
Section LEPTEGOUANA Woodring, 1928
Marginella (Leptegouana) vaughanensis Mansfield, n. sp.
Plate 2, Figure 13
Shell small and subcylindrical. Spire very low-only slight-
ly higher than margin of outer lip. Suture appressed and ob-
scure. Posterior shoulder rounded; body whorl very weakly
depressed medially, slightly more depressed behind outer lip.
Outer lip nearly straight; margin incurved and weakly denti-
culated between curved extremities. Aperture linear and
nearly as long as.shell. Columella provided with 4 oblique pli-
cations all of which are of nearly the same strength; lower
2 more oblique, more closely spaced than the posterior 2, and
situated on the weakly curved columella. The anterior pli-
cation forms the inner border of the short and moderately wide
anterior canal.
The holotype (U.S.N.M.Cat.No.373131) measures: Altitude,
11 mm.; diameter, 6.5 mm.
The description is based upon a single specimen. Perhaps
the closest related living species is Marginella guttata Dillwyn,
but the latter species has a relatively narrower posterior ex-
tremity than M. vaughanensis, n. sp.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 29

Marginella coniformis Sowerby, a species occurring in the
Miocene Bowden marl of Jamaica and the Gurabo formation,
Dominican Republic, is closely allied to M. vaughanensis, n. sp.
which perhaps should be regarded as a subspecies of the West
Indian fossil. However, the new species has a much smaller
shell- and lacks the callus on the face of the shell.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only locality).


Marginella (Leptegouana) blountensis Mansfield, n. sp.
Plate 2, Figure 14
Shell small, solid and subovate. Spire short, extending only
about one millimeter above outer lip margin. Spire whorls
very weakly inflated. Sutural area shallowly depressed. Body
whorl with a rounded shoulder, inflated on the upper third
behind the outer lip margin and very weakly depressed in
front of this swollen area. Aperture narrow, slightly wider
below. Outer lip nearly straight between curved extremities
and marginally bearing rather strong denticles. Columella
bearing 4 folds of nearly the same strength, 2 lower plications
more oblique and more closely spaced; the anterior one con-
tinuous with the margin of the anterior canal.
The holotype (U.S.N.M.Cat.No.373132) measures: Altitude,
11.5 mm.; diameter, 6.7 mm.
The new species is closely related to Marginella limatula
Conrad, a species described from the upper Miocene at Suf-
folk, Virginia, and reported as occurring in later deposits and
in the Recent fauna; but differs from the latter in having a
smaller and more slender shell and in lacking the swollen
area behind the outer lip on the upper third of the last whorl.
Marginella (Leptegouana) maoensis Maury from the Cer-
cado formation, middle Miocene, Dominican Republic, is close-
ly related to the new species, differing from the latter in having
a more curved outer lip and a more expanded aperture anter-
iorly.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
locality); Station 12044, Bell place, upper locality, Walton
County (one specimen).





30 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Family MITRIDAE
Genus MITRA Martyn, 1784
Subgenus TIARA Swainson, 1831
Mitra (Tiara) blountensis Mansfield, n. sp.
Plate 2, Figure 10
Shell of moderate size, rather slender, strongly spirally sculp-
tured; nucleus decollate; 8 whorls remaining on holotype.
Whorls weakly convex and weakly tabulated at the suture.
Suture indistinct, closely adhering to spiral. Spiral sculpture
(3 on spire whorls and 10 to 12 on body whorl to siphonal fas-
ciole) of strong, erect, thin, subacute, equidistant primary lir-
ations intercalated with a spiral thread. This intermedial
thread is more strongly developed on the later spire whorls
and on the upper part of the body whorl and is either very
faint or absent elsewhere. Axial sculpture of regularly placed,
flat, weakly striate, narrow bands-a little wider than inter-
spaces-lying in the valleys of the primary spirals and over-
running the secondary spirals. Siphonal fasciole with about
5 oblique spirals. Outer lip thin and marginally weakly crenu-
late. Columella on holotype bearing 4 oblique folds, the
posterior 2 being the stronger. A larger specimen than the
holotype has 5 folds.
The holotype (U. S. N. M. Cat. No. 373133) measures: Length,
25 mm.; diameter, 7.5 mm.
Mitra blountensis n. sp. is related to Mitra stephensoni Mans-
field, a species from the upper Miocene of Florida, but differs
from the latter in having a slimmer shell, a relatively longer
spire and one less primary spiral on the spire whorl and in
the absence of tertiary spiral threads.
Mitra henekeni Sowerby, middle Miocene, West Indies, has
a stouter shell and stronger spiral sculpture.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only locality).

Genus VEXILLUM ("Bolten") Roeding, 1798
Subgenus UROMITRA Bellardi, 1887
Vexillum (Uromitra) alaquaense Mansfield, n. sp.
Plate 2, Figures 11, 12
Shell small, moderately stout with a high spire and short
canal, axial sculpture stronger than spiral and consisting of
11/2 nuclear and 6 post-nuclear whorls. Nuclear whorls smooth
and naticoid. Post-nuclear whorls weakly inflated and weak-





( ALAQUA CREEK VALLEY GASTROPOCDS AND SCAPHOPODS 31

ly constricted at the suture. Axially sculptured with slightly
offset, nearly vertical axials (17 on the penultimate whorl)-
a little narrower than interspaces-and extending from suture
to suture. Intercostal valleys are crossed by flat bands (about
6 on the spire whorls) separated by narrower incised lines.
Ribs on the body whorl extend to the base. Stronger spirals
are present on the base of the body whorl and continue over
the siphonal fasciole. Outer lip thin, marked far within by 6
weak lirations. Columella provided with 4 oblique plications;
the posterior being the strongest and the anterior one being
more oblique, weak and continuous with the border of the an-
terior canal.
The holotype (U. S. N. M. Cat. No. 373134) measures: Al-
titude, 8.6 mm.; diameter 3.2 mm.
The new species is a descendant and therefore closely relat-
ed to a species from the Shoal River formation of Florida des-
cribed in manuscript by Gardner but differs from the Shoal
River form in having a much stouter shell.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
locality) : Station 12044, Bell place, upper locality, Walton
County (one young specimen and relationship not definitely
determined).

Family FASCIOLARIIDAE
Genus FUSINUS Rafinesque, 1815
Fusinus alaquaensis Mansfield, n. sp.
Plate 2, Figures 9, 17
Shell of moderate size, rather slender with a high spire and
long canal. Whorls weakly inflated. First nuclear whorl
smooth, succeeding whorl rounded and axially crossed by fine
threads, obscure at first and more distinct later. Early post-
nuclear whorls ornamented with 5 primary spirals, the an-
terior third at the periphery, the posterior two on the upper
slope, and the fourth and fifth below the periphery. A second-
ary thread usually intercalates the primaries. On the pe-
nultimate whorl there are 6 primary spirals, intercalated with
one secondary thread. Body whorl and canal with spiral
sculpture similar to that on the spire whorls. Axials on later
whorls fade out. Pillar thick.
Larger cotype (U. S. N. M. Cat. No. 373135) measures: Dia-
meter, 31 mm.





32 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Fusinus burnsii Dall, an upper Miocene species from Peters-
burg, Va., is closely allied to the new species, differing from the
latter in having a more slender shell and weaker secondary
spirals.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
locality); Station 12044, Bell farm, upper locality, Walton
County.

Genus BUSYCON Bolten, 1798
Busycon propecoronatum Mansfield, n. sp.
Plate 3, Figures 1, 2

Shell moderately large, rather fragile, turrited, and consist-
ing of about 8 whorls in all. First turn smooth, following turn
carinated at the lower part, and sculptured on the first third
with fine axial threads, which are situated mainly on the low-
er half; these are followed by fine denticles on the shouldered
margin and later on by tubercles. Post-nuclear whorls tabu-
lated in front of the suture, sharply angled at the shoulder
and precipitous below. On the first three post-nuclear whorls,
the area in front of the suture declines anteriorly toward the
shoulder but on the following whorls this area declines toward
the upper suture. The excavation at the suture is shallow on
the early whorls but becomes deeper in ascending the whorl.
The tubercles at the shoulder on the later whorls are rather
strong and are connected by a ridge. Spiral sculpture on the
spire whorls consists of very fine threads, which are stronger
on the raised area behind the shoulder. Upper part of body
whorl without spirals, lower part and canal with moderately
strong spirals. Outer lip and canal on holotype missing, but
better preserved young specimens show a thin outer lip and a
long canal.
The holotype (U. S. N. M. Cat. No. 373136) measures: Alti-
tude, 65 mm.; diameter, 40 mm.
B. propecoronatum n. sp. is closely related to B. coronatum
(Conrad) from the St. Marys formation of Maryland, differ-
ing from the latter species in having a shallower channel in
front of the suture and a more tabulated and more posteriorly
sloping area in front of the suture.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality (type and only locality).





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 33

Busycon blountense Mansfield, n. sp.
Plate 3, Figures 3, 4
Shell small, broad, thin, low-spired and consists of about
4% remaining whorls; nucleus decollate. Spire rises about 7
millimeters above carina of the body whorl. Spire whorls
gently slope anteriorly. Suture shallowly depressed. Whorls
with a low, undulating border, weakly nodulous on the early
whorls but only undulating on the later whorls. Spirals on
spire whorls consisting of fine threads on the early whorls and
coarser threads on the later whorls, being stronger on the an-
terior half of the whorl. Body whorl slightly inflated above
and constricted at the base and sculptured with rather widely
spaced spiral threads and occasional finer intermedial threads.
The holotype (U. S. N. M. Cat. No. 373137) measures: Alti-
tude, 33.5 mm.; diameter, 24.5 mm.
Occurrence: Upper middle Miocene, Area zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only locality).

Genus LATIRUS Montfort, 1810
Latirus waltonensis Mansfield, n. sp.
Plate 3, Figure 10
Shell rather small, solid, with a high spire and long canal.
Earliest whorls missing. Suture deep and appressed. Spire
whorls sculptured with 7 rounded, subnodulous axials, strong-
ly developed on lower two-thirds of the whorl and absent in
upper third. These axials fade out on the last half of body
whorl. Spire whorls sculptured with closely spaced pri-
mary spiral cords alternating with secondary threads. A
small chink is near the lower end of the columella. Columel-
la provided with 3 plications, the upper one weaker than the
lower.
The holotype (U. S. N. M. Cat. No. 373138) measures: Alti-
tude, 47 mm.; diameter, 18 mm.
Occurrence: Upper middle Miocene, Area zone. Vaughan
Creek, Walton County (type locality); not collected elsewhere.
Collected by the Florida Geological Survey.

Family NEPTUNEIDAE
Genus NEPTUNEA "Bolten", Roeding, 1798
Neptunea? alaquaensis Mansfield, n. sp.
Plate 3, Figure 13
Shell rather small, thin, fragile, turrited; with a moderately
long spire and canal and with 5 remaining whorls; tip decol-





34 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

late. Earliest whorls smooth and rounded. Post nuclear
whorls tabulated above the angled shoulder and weakly in-
flated below. Suture depressed and closely adhering. Sculp-
ture on spire whorls consists of a narrow rounded spiral band
in front of and adjacent to the suture, a stronger band at the
shoulder and 3 below, the suture adhering to the basal one.
Sculpture of body whorl below shoulder and on canal consist-
ing of strong spiral bands usually intercalated with weaker
bands. Lower end of canal on holotype missing but other
immature specimens have a rather long canal without any ob-
served plications on the columella.
The holotype (U. S. N. M. Cat. No. 373139) measures: Alti-
tude, 35 mm. (canal broken off); diameter, 24 mm.
Neptunea? alaquainsis n. sp. has some characters apparent-
ly showing a relationship to "Chrysodomus" patuxentensis
Martin, a small form occurring in the Calvert and Choptank
formations of the Chesapeake group of Maryland but may
represent another genus. The canal of C. patuxentensis is
straighter than that of the Florida form and has a callus along
the inner margin.
Neptunea? alaquadnsis may be related to "Halia" americana
Olsson,' a species described from the Gatun formation, Canal
Zone, but my species does not appear to belong to the genus
Halia. I have seen only the illustration of Olsson's species.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality, Walton County (type
and only locality).

Family COLUBRARIIDAE
Genus PHOS Montfort, 1810
Phos blountanus Mansfield, n. sp.
Plate 3, Figure 5
Shell rather solid, moderately slender, and consisting' of 3
nuclear and 5 post-nuclear whorls. Apical turn small and de-
pressed; following 2 turns smooth, inflated and much larger.
Protractive axials begin on the fourth whorl and are followed
shortly by faint spirals. Post-nuclear whorls moderately in-
flated and gradually enlarging. Axials stronger than spirals.
Axial sculpture consisting of about 12 nearly vertical, rather
strong ribs, which extend from suture to suture and are separ-
ated by rounded valleys a little wider than ribs. The ribs on

'Olsson, A. A., Bull. Amer. Paleont., vol. 9, p. 251, pl. 7, fig. 7, 1922.





ALAQUA CREEK VALLEY GASTROPO'DS AND SCAPHOPODS 35

the body whorl continue to the siphonal fasciole. Spiral
sculpture consisting of closely spaced bands, which alternate
in strength and overrun both axials and valleys. Outer lip
submarginally marked within with about 11 spiral ridges. In-
ner lip provided with a thin callus. Anterior canal short. Si-
phonal fasciole diagonally marked with about 8 threads.
The holotype (U. S. N. M. Cat. No. 373140) measures:
Length, 14 mm.; diameter, 5 mm.
Phos blountanus n. sp. has a stouter shell and closer-set
spirals than Phos vaughani Mansfield from the upper Miocene
of Florida.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Known
only from the type locality.

Phos blountanus laquanus Mansfield, n. suDsp.
Plate 3, Figure 6
Shell similar in character to Phos blountanus n. sp. except
in the nature of the spiral sculpture. The spire whorls and
the first half of the body whorl have no secondary spiral sculp-
ture-the secondary spirals appearing on the last half of the
body whorl. The spire whorls have 4 very narrow, widely
spaced bands, the posterior one being weaker than the others.
There are 14 ribs on the penultimate whorl.
The holotype (U. S. N. M. Cat. No. 373141) measure: Length,
14 mm.; diameter, 5.3 mm.
Type locality: Station 12046, Vaughan Creek, upper local-
ity Walton County, Florida.
Occurrence: Upper middle Miocene. Known only from the
type locality.
Family ALECTRIONIDAE
Genus ALECTRION Montfort, 1810
Alectrion blountensis Mansfield, n. sp.
Plate 2, Figure 16
Shell rather stout, solid; axial sculpture stronger than spiral;
with 3 nuclear and 4 post-nuclear whorls. Nuclear whorls
smooth, rounded and rapidly enlarging. Post-nuclear whorls
moderately inflated and constricted at the sutures. Axially
sculptured on penultimate whorl with 9 strong, slightly retrac-
tive ribs extending across the whorl and separated by wider
valleys. Spiral sculpture consisting of 2 to 3 threadlets below
the suture; 4 to 5 very narrow bands extending forward over






36 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

the periphery, and usually 2 threadlets behind the suture. The
axials continue on the body whorl to the base but the spirals
continue over the siphonal fasciole. Outer lip with a thin mar-
gin, strengthened behind with a strong varix and marked
within with 7 to 9 spiral ridges. Parietal wall and lower
columella with 1 to 2 denticles. Anterior canal short and
recurved.
The holotype (U. S. N. M. Cat. No. 373142) measures: Length,
6.5 mm.; diameter, 3.5 mm.
Type locality: Station 12046, Vaughan Creek, upper local-
ity, Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Known
only from the type locality.

Family COLUMBELLIDAE
Genus MITRELLA Risso, 1826
Mitrella communis laqua Mansfield, n. subsp.
Plate 2, Figure 15
Shell small, solid, rather acute; spire and body whorl about
the same length and consisting of 9 whorls in all. Apical turn
minute, following turns gradually enlarging. Whorls weakly
inflated. Suture closely appressed and shallowly depressed.
Body whorl broadly angled at the lower shoulder. Canal sculp-
tured with about 12 narrow spiral bands. Outer lip provided
with a varix behind and with 7 elongate denticles within. A
small patch of callus is on the parietal wall below the commis-
sure and a thin callus overruns the lower part of the columella.
Anterior canal short, terminally emarginate and dorsally re-
flected.
The holotype (U. S. N. M. Cat. No. 373143) measures:
Length, 9.3 mm.; diameter, 3.8 mm.
Mitrella communis laqua n. subsp. is closely related to Mi-
trella communis mediocris Pilsbry and Harbison from the Shi-
loh marl member of the Kirkwood sand of New Jersey and Mi-
trella communis (Conrad) from the St. Marys formation of
Maryland. It is about the same size of Mitrella communis med-
iocris but it has more inflated whorls than that subspecies and
the lower shoulder of the body whorl is more angled. The St.
Marys species is larger, otherwise it is very similar.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Type lo-
cality; Station 12044, Bell place, upper locality, Walton County.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 37

Genus ANACHIS H. and A. Adams, 1853
Subgenus COSTOANACHIS Sacco, 1890
Anachis (Costoanachis) alaquaensis Mansfield, n. sp.
Plate 3, Figure 11
Shell small, rather acute, weakly turrited, spire and body
whorl about the same length, and consisting of 3 rounded,
smooth nuclear whorls and 41/2 post-nuclear whorls. Spire
whorls gradually enlarging. Suture appressed and undulat-
ing. Sculpture of spire whorls consisting of moderately strong,
weakly arcuate axials (15 on penultimate whorl), a little nar-
rower than interspaces and extending across the whorls. Last
half of body whorl without axials and marked only by a varix
behind the outer lip border. Base of body whorl and canal
sculptured with about 10 very narrow bands. Outer lip within
marked on the lower two-thirds with 7 elongate denticles, the
posterior one being the strongest. Callus on columella bear-
ing 5 small rounded denticles. Anterior canal moderately
short, wide and terminally emarginate.
The holotype (U. S. N. M. Cat. No. 373144) measures:
Length, 7.2 mm.; diameter, 3 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County.
Occurrence: Upper middle Miocene, Area zone. Known
only at the type locality.


Anachis (Costoanachis) vaughanensis Mansfield, n. sp.
Plate 3, Figure 8

Shell small, solid, moderately slender, axial sculpture
stronger than spiral, and consisting of 3 nuclear and 3 post-
nuclear whorls. Nuclear whorls smooth, rapidly enlarging.
Post-nuclear whorls sculptured with weakly protractive axials
extending across the whorls and with spiral striae lying main-
ly in the valleys. Ribs on the body whorl terminate at the
base. Base of body whorl and canal marked with closely
spaced spirals. Outer lip within with 7 denticles. Callus of
columella provided with minute denticles. Anterior canal
short, wide and terminally emarginate.
The holotype (U. S. N. M. Cat. No. 373145) measures:
Length, 4.5 mm.; diameter, 2 mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.





38 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Anachis (Costoanachis) orthopleura Woodring, a species
from the Bowden marl, Jamaica, is closely related to A. (Cos-
toanachis) Vaughanensis, n. sp., differing from the latter in
having stronger axials on the early post-nuclear whorls and
stronger spirals on the base of the body whorl and on the
pillar.
Occurrence: Upper middle Miocene, Area zone. Known
only from the type locality.

Family MURICIDAE
Genus TYPHIS Montfort, 1910
Typhis harrisi waltonensis Mansfield, n. subsp.
Plate 5, Figure 9
The new subspecies is very closely related to Typhis harrisi
Olsson, a species occurring in the upper Miocene of Florida
and in the Duplin marl at the Natural Well, North Carolina,
differing from the latter in having weaker spirals on the faces
of varices. Only microscopic spiral lines are visible on the
varices of the new subspecies, whereas on T. harrisi they are
much coarser. The new subspecies agrees with T. harrisi in
all other characters.
The holotype (U. S. N. M. Cat. No. 373146) measures:
Length, 17.5 mm. (nucleus lost); diameter, 11 mm.
Typhis harrisi waltonensis n. subsp. is also closely related
to T. acuticostata Conrad from the St. Marys formation of
Maryland.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Known
only at the type locality.

Genus UROSALPINX Stimpson, 1865
Urosalpinx? vaughanensis Mansfield, n. sp.
Plate 3, Figure 7
Shell small, spire shorter than last whorl, both axially and
spirally sculptured and consisting of 11/2 nuclear and 4 post-
nuclear whorls. Nuclear whorls small, erect and smooth.
Post-nuclear whorls inflated and rounded, and bearing at the
periphery a strong brownish colored band. Sculpture on the
spire whorls consists of 3 low, flat, narrow bands above the
periphery and 2 below it and 9 broad axials which are strongly
developed at and behind the periphery. Lower half of body
whorl and canal sculptured mainly with spiral bands, which





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 39

are more closely spaced on the canal. Whole shell trans-
versely sculptured with fine growth lines, which are fibrous on
the sutural margin. Outer lip weakly crenulated marginally
and bearing at a short distance within 6 elongate denticles.
Columella weakly bulged near the entrance to the anterior
canal. Anterior canal rather narrow and reflected dorsally.
The holotype (U. S. N. M. Cat. No. 373147) measures: Alti-
tude 13.3 mm.; diameter, 6 mm.
Urosalpinx? vaughanensis n. sp., though much smaller,
shows close relationship to U. rusticus (Conrad), a species
confined to the St. Marys formation of Maryland.
Occurrence: Upper middle Miocene, Arca zone. Station
12046, Vaughan Creek, upper locality, Walton County. Type
and only locality.
Genus MURICIDEA (Swainson) M6rch, 1852
Muricidea? alaqua8nsis Mansfield, n. sp.
Plate 3, Figure 9; Plate 4, Figure 10
Shell small, spire about one-third length of body whorl,
axial sculpture stronger than spiral, about 1/z2 nuclear and 5
post-nuclear whorls. Whorls tabulated in front of the suture.
Axial sculpture consists of 6 strong ribs extending from su-
ture to suture on the spire whorls and across the canal on the
body whorl. These axials are retractive over the tabulated
area and nearly vertical below the periphery and when un-
broken bear reflected hollow spines at the periphery on the
later whorls. The earliest post-nuclear whorls do not bear
spines. Spiral sculpture (on spire 3 and on body 12) of pri-
mary cords overrunning axials and interspaces. A medial
secondary spiral is present on the body whorl. In addition to
the primary and secondary ornamentation, tertiary threadlets
are visible on most of the shell. Aperture ovate, widest above.
Anterior canal rather long, nearly closed and curved backward
and to the right. Outer lip within marked with 9 rather short
raised spiral lirations, the posterior liration being larger, more
widely spaced, and situated near the center of the posterior
area of the aperture. Inner lip with a thin callus, bearing 3
lirations at the anterior third. Anterior canal moderately long
and nearly closed. Siphonal fasciole strong and ornamented
with lamellae.
Cotypes (U. S. N. M. Cat. No. 373148) measure: Larger co-
type-length, 15 mm.; diameter, 81/ mm. Smaller cotype,
length, 13 mm.; diameter, 51/2 mm.






40 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Known
only at the type locality.

Family EPITONIIDAE
Genus EPITONIUM ("Bolten") Roeding, 1798
Epitonium alaquaense Mansfield, n. sp.
Plate 3, Figure 12
Shell small, moderately acute, only axially sculptured, and
consisting of 2 nuclear and 6 post-nuclear whorls. Nucleus
slender, whorls rounded and smooth. Post-nuclear whorls
rapidly enlarging. Axials nearly vertical along the spire, con-
tiguous at the sutures, 12 on the body whorl and 9 on the pre-
ceding whorl, upright, thin on the earlier whorls and thicker
on later whorls. Aperture broadly elliptical, the longitudinal
axis being a little greater.
The holotype (U. S. N. M. Cat. No. 373149) measures:
Length. 71/2 mm.; diameter 3 mm.
Epitonium (Nitidiscala) aduncum Woodring, from the Bow-
den formation, Jamaica, is closely allied to E. alaquainse n.
sp., differing mainly from the latter in having a slimmer shell
and fewer axials.
Type locality: Station 12046, Vaughan Creek, upper local-
ity, Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Known
only at the type locality.

Family CASSIDIDAE
Genus SEMICASSIS Mbrch, 1852
Subgenus TYLOCASSIS Woodring, 1928
Semicassis (Tylocassis) inflata waltonensis, Mansfield, n. subsp.
Plate 4, Figures 5, 9
Shell of moderate size, strongly inflated, spire low. Nucleus
naticoid, consisting of 21/ smooth whorls. Sculpture of post-
nuclear whorls consisting of spiral bands intercalated with a
spiral thread or narrow band and retractive axials forming a
reticulate ornamentation, especially on the earlier whorls.
Axials weaker than bands and more strongly developed at the
intersection with them, forming on the wider bands low and
elongate elevations. There are four spiral bands on the pe-
nultimate whorl. The secondary spirals are a little stronger
over the periphery of the whorl. Outer lip provided with a





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 41

strong varix and with 20 elevated, entering lirations on the in-
ner margin. Parietal wall marked with spiral cords. Lower
half of callus of inner lip bearing rounded and elongate den-
ticles; marked with ridges within. Siphonal fasciole strongly
developed, marked off behind by a deep groove and sculptur-
ed with spiral bands alternating with spiral threads.
The holotype (U. S. N. M. Cat. No. 373150) measures:
Length, 43.3 mm.; diameter, 31 mm.
Smaller paratype: Length, 35 mm.; diameter, 20 mm.
Semicassis inflata waltonensis, n. subsp., is closely related to
and probably is an ancestoral form of Semicassis inflata Shaw,
a living east coast species, differing from the latter in having
a relatively shorter and more inflated shell and showing a
tendency to a more persistent interpolation of secondary spiral
threads or narrow bands.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone.

Family TURRITELLIDAE
Genus TURRITELLA Lamarck, 1799
Turritella gatunensis blountensis Mansfield, n. subsp.
Plate 4, Figures 1, 2
Shell of medium size, moderately slender and constricted at
the excavated sutures. Earliest whorls rounded and weakly
medially carinated. On the following whorls a basal spiral ap-
pears, weak at first but soon becoming as strong as the medial
one, forming between them a shallow depression. Another
spiral comes in on the later whorls on the posterior slope,
which becomes anteriorly nearly as strong as the one in front
of it. In addition to the primary spirals, secondary and ter-
tiary spirals overrun the whorls. The suture winds against the
base of the preceding whorl.
The cotypes (U. S. N. M. Cat. No. 373151) measure: Speci-
men with preserved earlier whorls. Length 41 mm.; diameter,
8 mm. Specimen with lost earlier whorls: Length, 40. mm.:
diameter 12 mm.
Turritella gatunensis Conrad is closely related to the new sub-
species but differs from the latter in having more medially car-
inate early whorls and an earlier development of the basal
spiral. It also has a less slender shell than the new subspecies.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.





42 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Occurrence: Upper middle Miocene, Area zone. Common
at type locality; Station 12044, Bell Place, upper locality, Wal-
ton County; Station 12049, 12050, Red Bay, lower bed, Walton
County. Four small specimens at Station 5618, 31/2 miles south-
west of DeFuniak Springs, Florida, uppermost bed of the Shoal
River formation, appear to belong to the new subspecies.

Turritella alaquaensis Mansfield, n. sp.
Plate 4, Figures 3, 7
Shell of medium size and moderately slender. Earliest 3 or
4 whorls carinated below middle of the whorl. On the third
or fourth whorl, another spiral appears on the posterior part
of the whorl, low at first but becoming stronger in ascending the
spire and forming a low medial concavity between it and the
anterior crenulated spiral. The sculpture on the later whorls
consists of 5 spirals; the first and second are situated at the up-
per third of the whorl, the posterior being a little weaker and
situated slightly below the suture. These spirals are closely
spaced, and somewhat doubled. The third spiral is situated
in a low depression near the middle of the whorl and a little
nearer to the fourth than the second spiral. The fourth spiral
is posterior to the basal one; and the basal one is in contact
with the suture. The crenulations on the first and second
spirals are retractive and those on the third and fourth pro-
tractive. The second and fourth spirals are about the same
strength; the third is a little weaker. The basal spiral is mark-
ed only by spiral threads. The whole shell is overrun with
fine spirals, which alternate in size.
The cotypes (U. S. N. M. Cat. No. 373152) measure: Larger
specimen with lost nucleus, length 52 mm.; diameter, 13.5 mm.
Specimen with preserved tip, length, 33.5 mm.; diameter, 8.5
mm.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Common
at type locality; Station 12044, Bell place, upper locality,
Walton County.
Turritella alaquaensis vaughanensis Mansfield, n. subsp.
Plate 4, Figure 8
Fragments of Turritella from the Alaqua Creek valley show a
slightly different type of sculpture than other specimens de-
scribed and are referred to a new subspecies. These specimens





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 43

differ from Turritella alaquaensis in having the spiral in the
middle of the whorl stronger and more centrally placed in the
concavity. The whorls have 5 spirals, counting the basal one,
all of which are nearly the same strength. The posterior 2
are closely spaced, the third medially and the fourth poster-
ior to the basal spiral. All spirals bear crenulations except
the basal one.
The holotype, a broken specimen (U. S. N. M. Cat. No. 373-
153) measures: Length, 29 mm.; diameter, 12.5 mm.
Type locality: Station 12047, Vaughan Creek, lower locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Type lo-
cality, rare? Poorly preserved specimens collected from the
lower bed at Red Bay, Walton County, appear to belong to
the new subspecies.

Turritella cookei permenteri Mansfield, n. subsp.
Plate 4, Figures 4, 6
The new subspecies is closely related to T. cookei harveyen-
sis Mansfield from the upper Miocene of Florida, differing only
slightly from the latter. The new subspecies differs from T.
cookei harveyensis in having a less slender shell, stronger
sculpture, and especially on the earlier whorls, a stronger
central spiral.
The cotypes (U. S. N. M. Cat. No. 373154) measure: Larger
specimen, length 44 mm.; diameter, 17.3 mm. Smaller speci-
men, length 41.5 mm.; diameter, 12.5 mm.
Type locality: Station 12048, near Permenter's old place,
Alaqua Creek, Walton County, Florida.
Occurrence: Upper Miocene, Ecphora zone. Known only
from the type locality.

Turritella subannulata leonensis Mansfield, new name
1930. Turritella subannulata jacksonensis Mansfield, Florida Geol. Survey
Bull. 3, p. 109, pl. 16, fig. 3
Not Turritella jacksonensis Cooke, Washington Acad. Sci. Jour., vol. 16,
p. 136, fig. 8, 1926
Type locality: Station 3423, lower upper Miocene bed at
Jackson Bluff, Leon County, Florida.
I take this opportunity to give a new name to this species
although the species is not known from the valley of Alaqua
Creek.







44 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Family NATICIDAE
Genus POLINICES Montfort, 1910
Subgenus EUSPIRA Agassiz, 1839
Polinices (Euspira) waltonensis Mansfield, n. sp.
Plate 5, Figure 13
Shell small, thin, glossy, low spired, consisting of 5 whorls
in all. Whorls inflated. Suture weakly appressed and mar-
ginally very weakly shouldered. Area below suture weakly
depressed, sculptured with weak retractive growth lines and,
on some specimens, by obscure spirals. Umbilicus large,
sculptured on the thin callus of the inner lip by spiral growth
lines and ascending threadlets. Inner lip with a thin callus
adhering to the parietal wall and the lower part of the body
whorl; the border opposite the umbilicus is curved inward and
below is continuous with the border of the aperture.
The holotype (U. S. N. M. Cat. No. 373155) measures:
Length, 20 mm.; diameter, 20.5 mm.
Type locality: Station 12044, Bell place, upper locality, Wal-
ton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Type lo-
cality, quite common; Station 12046, Vaughan Creek, upper lo-
cality, abundant.

Polinices (Euspira) propeinternus Mansfield, n. sp.
Plate 5, Figure 14
Shell small, rather thin, glossy, moderately low spired and
consisting of 41/2 whorls in all. Apical turn loosely coiled; fol-
lowing whorls inflated and tabulated below the suture. Su-
ture on early whorls very lowly depressed and on later whorls
weakly appressed. Sculpture of weak retractive growth
structures and obscure spirals. Aperture subovate, outer mar-
gin more rounded than inner margin; upper part of inner lip
provided with a thin callus which closely adheres to the lower
part of the body whorl; margin opposite umbilicus nearly
straight and continuous below with the anterior margin of the
aperture. Umbilicus large, open, provided, on the left side,
with an entering ascending sulcus.
The holotype (U. S. N. M. Cat. No. 373156) measures:
Length, 11.4 mm.; diameter, 10 mm.
Polinices propeinternus n. sp. is closely related to and prob-
ably is a precursor of P. interns (Say) a species ranging in
time from the upper Miocene into the Pliocene, but it has a
much smaller shell than the latter species.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 45

Polinices tuomeyi (Whitfield) a species described from the
Miocene marls at Jerico, New Jersey, is related to P. propein-
ternus but differs from the latter in having a heavier shell with
less tabulated whorls.
Type locality: Vaughan Greek, upper locality, Walton
County, Florida.
Occurrence: Upper middle Miocene, Arca zone. Type local-
ity (common) known only from the type locality.

Family TROCHIDAE
Genus SOLARIELLA S. Wood, 1842
Solariella laqua Mansfield, n. sp.
Plate 5, Figures 1, 2, 3, 4, 5
Shell small, turrited, moderately high spired for the genus
and consisting in all of 52 whorls. Earliest turn smooth and
rounded with an immersed tip; following whorls nearly flat
below the suture, very sharply angled at the posterior shoulder
and sculptured with one weakly beaded spiral in front of the
suture, a nearly smooth cord at the posterior shoulder, and 2
smooth cords below, the medial one being a little weaker and
situated nearer the basal cord. Another weaker spiral is pre-
sent above the medial one on some specimens. Base of body
whorl with 5 to 7 rather weak and nearly smooth spiral cords.
Umbilical cords weakly nodulated, coarser than the basal
cords, and separated by rather wide intervals. Aside from the
stronger spirals, the whole shell is overrun with microscopic
spirals. Retractive axial growth structures ornament most of the
shell being more prominent on the tabulated area in front of
the suture. Umbilicus large and scalariform. Aperture nearly
round; inner lip thin and closely adhering to the body whorl.
The larger cotype (U. S. N. M. Cat. No. 373157) measures:
Length, 5.5 mm.; diameter, 7 mm.
The following species, when compared with S. laqua, show
the following differences: S. vaughani Mansfield, an upper
Miocene species, has a larger shell and coarser ornamentation;
S. altiusulca Guppy, a species from the Bowden marl of Jamai-
ca, has a less tabulated area below the suture, more rounded
whorls and more spirals on the base; S. major (Gardner and
Aldrich), an upper Miocene species, though closely related, has
more strongly nodulated spirals and weaker umbilical cords;
S.lacunella depressa Dall, a living subspecies from Florida and
the Antilles, has a lower spire and closer spaced spirals.






46 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE

Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Type lo-
cality (quite common); Station 12044, Bell farm, upper lo-
cality, Walton County (rare).

Family VITRINELLIDAE
Genus VITRINELLA C. B. Adams, 1850
Vitrinella blountana Mansfield n. sp.
Plate 5, Figures 6, 7, 8
Shell small, rather thin, low-spired, consisting in all of 3
whorls, the body whorl comprising most of the shell. Whorls
weakly flattened in front of the suture, rounded below and
marked only by growth lines. Umbilicus large and smooth.
Aperture large and rounded; inner lip adhering to the body
whorl.
The holotype (U. S. N. M. Cat. No. 373158) measures: Al-
titude, 1 mm.; diameter, 2.2 mm.
V. blountana n. sp. appears to be most closely related to V.
diaphana (d'Orb.) Bush, a species occurring off Cape Hatteras,
North Carolina, differing in having a flatter spire than the
living species.
Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene, Area zone. Known
only at the type locality.

Class SCAPHOPODA
Family SIPHONDENTALIIDAE
Genus CADULUS, Philippi, 1844
Cadulus blountense, Mansfield, n. sp.
Plate 5, Figure 10
Shell small, very slender, smooth, polished, gently curved-
the posterior extremity slightly more curved than the anterior.
Anterior end weakly constricted. Aperture nearly round.
The holotype (U. S. N. M. Cat. No. 373159) measures: Length,
7 mm.; greatest diameter 0.7 mm.
Perhaps the most closely related living species is Cadulus
acus Dall from Samana Bay, Dominican Republic; however,
the living species when compared with the fossil has a more
slender shell and possesses extremely fine circular grooves
or lines not observed on the fossil form.





ALAQUA CREEK VALLEY GASTROPODS AND SCAPHOPODS 47

Type locality: Station 12046, Vaughan Creek, upper locality,
Walton County, Florida.
Occurrence: Upper middle Miocene. Type locality (com-
mon); Station 12044, Bell farm, upper locality, Walton Coun-
ty (rare).
























PLATES 1-5














PLATE 1

Figure 1. Terebra (Strioterebrum) alaquaensis Mansfield,
n. sp. Holotype, x3. Page 15.
2. Terebra (Strioterebrum) alaquaensis laqua Mans-
field, n. subsp. Holotype, x3. Page 16.
3. Terebra (Strioterebrum) alaquaensis ulaqua
Mansfield, n. subsp. Holotype, x2. Page 17.
4. Terebra (Strioterebrum) vaughanensis Mansfield,
n. sp. Holotype, x3. Page 17.
5. Terebra (Strioterebrum) blountensis Mansfield,
n. sp. Holotype, x2. Page 18.
6. Conus laqua Mansfield, n. sp. Holotype, x2.
Page 19.
7. Conus alaquaensis Mansfield, n. sp. Holotype,
xl/2. Page 18.
8. Conus vaughanensis Mansfield, n. sp. Holotype,
xl. Page 20.
9. Conus waltonensis blountensis Mansfield, n. sub-
sp. Holotype, x2/2. Page 19.
10. Agladrillia uquala Mansfield, n. sp. Holotype, x3.
Page 24.
11. Crassispira blountensis Mansfield, n. sp. Holo-
type, x2. Page 22.
12. Conus aff. C. proteus Hwass. Figured specimen,
xl, view of apical end of spire. Page 21.
13. Ringicula blountensis Mansfield, n. sp. Holotype,
xl1. Page 15.
14. Polystira alaquaensis Mansfield, n. sp. Holotype,
xl/2. Page 21.


[50]





BULLETIN TWELVE, PLATE 1


1




2

a
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6













10


.'3
. 51














3






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'\ L


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5


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[ 51]


GEOLOGICAL DEPARTMENT


I--



1





BULLETIN TWELVE, PLATE 2


'.9


4-
3










7











12



13 14 16


13 14 Is


[52]


GEOLOGICAL DEPARTMENT












PLATE 2

Figures 1, 2. Cymatosyrinx vaughanensis Mansfield, n. sp.
1. Paratype, showing character of early whorls,
x5; 2, holotype, x2. Page 23.
3. Glyphostoma macneili Mansfield, n. sp. Holo-
type, x2. Page 25.
4. Cancellaria (Narona) blountiana Mansfield, n.
sp. Holotype, x3. Page 27.
5. Cancellaria (Cancellaria) laqua Mansfield, n.
sp. Holotype, x3. Page 26.
6. Clathrodrillia? laqua Mansfield, n. sp. Holo-
type, x3. Page 23.
7, 8. Cancellaria (Narona) agria uaquala Mansfield,
n. subsp. 7, paratype, x8; 8, holotype, x4. Page
27.
9, 17. Fusinus alaquainsis Mansfield, n. sp. Cotypes:
9, x3; 17 xl. Page 31.
10. Mitra (Tiara) blountensis Mansfield, n. sp.
Holotype, x2. Page 30.
11,12. Vexillum (Uromitra) alaquaense Mansfield, n.
sp. 11, paratype, x10; 12, holotype, x4. Page
30.
13. Marginella (Leptegouana) vaughanensis Mans-
field, n. sp. Holotype, x2. Page 28.
14. Marginella (Leptegouana) blountensis Mans-
field, n. sp. Holotype, x2. Page 29.
15. Mitrella communis laqua Mansfield, n. subsp.
Holotype, x3. Page 36.
16. Alectrion blountensis Mansfield, n. sp. Holo-
type, x4. Page 35.


[531









PLATE 3

Figures 1, 2. Busycon propecoronatum Mansfield, n. sp. Holo-
type, xl. 1, view of apical end; 2, front
view. Page 32.
3, 4. Busycon blountense Mansfield, n. sp. Holotype,
xll%. 3, view of apical end; 4, front view.
Page 33.
5. Phos blountanus Mansfield, n. sp. Holotype, x3.
Page 34.
6. Phos blountanus laquanus Mansfield, n. subsp.
Holotype, x3. Page 35.
7. Urosalpinx? vaughanensis Mansfield, n. sp.
Holotype, x3. Page 38.
8. Anachis (Costoanachis) vaughanensis Mans-
field, n. sp. Holotype, x8. Page 37.
9. Muricidea? alaquadnsis Mansfield, n. sp. Holo-
type, x2. Page 39.
10. Latirus waltonensis Mansfield, n. sp. Holotype,
xl/2. Page 33.
11. Anachis (Costoanachis) alaquainsis Mansfield
n. sp. Holotype, x4. Page 37.
12. Epitonium alaquadnse Mansfield, n. sp. Holo-
type, x4. Page 40.
13. Neptunea? alaquainsis Mansfield, n. sp. Holo-
type, xll2. Page 33.


[54]





BULLETIN TWELVE, PLATE 3


7







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II~-se Ia
I0:


[55]


GEOLOGICAL DEPARTMENT





GEOLOGICAL DEPARTMENT


Sn'j


10
10


pCl~r

12


BULLETIN TWELVE, PLATE
















PLATE 4


Figures 1, 2, Turritella gatunensis blountensis Mansfield, n.
subsp. Cotypes, x2. Page 41.
3, 7. Turritella alaquaensis Mansfield, n. sp. Cotypes,
3, x1/2; 7, x2. Page 42.
4,6. Turritella cookei permenteri Mansfield, n.
subsp. Cotypes, 4, x2; 6, xl. Page 43.
5, 9. Semicassis (Tylocassis) inflata waltonensis
Mansfield, n. subsp. Holotype, xl. Page 40.
8. Turritella alaquaensis vaughanensis Mansfield,
n. subsp. Holotype, x2. Page 42.
10. Muricidea? alaquaensis Mansfield, n. sp. Para-
type. x3. Page 39.
11, 12. Sinum aff. S. fragilum Conrad, x3. From Station
12046, Vaughan Creek, upper locality, Walton
County, Florida. U. S. Nat. Mus. No. 373160.


[57]














PLATE 5


Figures 1, 2, 3, 4, 5. Solariella laqua Mansfield, n. sp. Cotypes,
1, 2, x4; 3, 4, 5, x3. Page 45.
6, 7, 8. Vitrinella blountana Mansfield, n. sp.
Holotype, x10. Page 46.
9. Typhis harrisi waltonensis Mansfield, n.
subsp. Holotype, x2. Page 38.
10. Cadulus blountense Mansfield, n. sp.
Holotype, xlO. Page 46.
11,12. Polinices (Dallitesta) coensis Dall, x2.
From Station 12046, Vaughan Creek,
upper locality, Walton County, Flor-
ida. U. S. Nat. Mus. No. 373161.
13. Polinices (Euspira) waltonensis Mans-
field, n. sp. Holotype, x2. Page 44.
14. Polinices (Euspira) propeinternus Mans-
field, n. sp. Holotype, x4. Page 44.


[ 58]





BULLETIN TWELVE, PLATE 5


6





7


S


10

10


13


I I


[ 59]


GEOLOGICAL DEPARTMENT








INDEX


A
Abderospira species 11
Acteocina species 11
Acteocina species, near A.
myremecoon 11
Acteon hamadryados 11
Acteon species 11
acuticostata, Typhis 38
aduncum, Epitonium (Nitidiscala)
10, 40
Agladrillia callothyra 25
Agladrillia uquala 24
agria, Cancellaria 28
Alabina species 7, 13
alaquaense, Epitonium 10, 40
alaquaense, Vexillum (Uromitra) 30
alaquaensis, Anachis
(Costoanachis) 37
alaquaensis, Conus 10, 18
alaquaensis, Fusinus 31
alaquaensis, Muricidea? 39
alaquaensis, Neptunea 33
alaquaensis, Polystira 21
alaquaensis, Terebra
(Strioterebrum) 15
alaquaensis, Turritella 42
Alectrion blountensis 35
Alectrion species 12
altiusulca, Solariella 45
americana, "Halia" 34
Anachis (Costoanachis)
alaquaensis 37
Anachis (Costoanachis)
orthopleura 38
Anachis (Costoanachis)
vaughanensis 37
apium, Conus 21
Arca zone 7
Architectonica species 13
attenuatum, Dentalium 10, 13
aureocincta, Marginella (Serrata)
12
B
barretti, Polystira 22
blountana, Vitrinella 46
blountanus, Phos 34
blountense, Busycon 33
blountense, Cadulus 10, 46
blountensis, Alectrion 35
blountensis, Conus waltonensis 19
blountensis, Crassispira 22
blountensis, Marginella
(Leptegouana) 29


blountensis, Mitra (Tiara) 30
blountensis, Ringicula 15
blountensis, Terebra
(Strioterebrum) 18
blountensis, Turritella
gatunensis 10, 41
blountiana, Cancellaria
(Narona) 27
burnsii, Fusinus 32
Busycon blountense 33
Busycon coronatum 32
Busycon montforti 12
Busycon propecoronatum 32
Busycon species 12

C
Cadulus blountense 10, 46
Calliostoma species 10, 13
callipeplum, Dentalium
(Laevidentalium) 7
callothyra, Agladrillia 25
Cancellaria agria 28
Cancellaria (Narona) agria
uaquala 27
Cancellaria (Narona) blountiana 27
Cancellaria (Cancellaria) laqua 26
Cancellaria reticulata leonensis 26
canrena, Natica 13
"Chrysodomus" patuxentensis 34
Circulus trilex 13
Clathrodrillia? laqua 23
coensis, Polinices (Dallitesta) 58
communis, Mitrella 36
coniformis, Marginella 10, 29
constrictum, Crucibulum 7
Conus alaquaensis 10, 18
Conus apium 21
Conus delessertii 20
Conus diluvionus 20
Conus harveyensis 18
Conus imitator 20
Conus laqua 19
Conus multiliratus gaza 19
Conus proteus 21
Conus pygmaeus 19
Conus vaughanensis 20
Conus waltonensis 20
Conus waltonensis blountensis 19
coronatum, Busycon 32
Crassispira blountensis 22
Crepidula fornicata 13
Crepidula plana 13
Crucibulum auriculum 13
Crucibulum constrictum 7, 13


[ 61 ]






62 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE


Crucibulum cf. C. multilineatum 13
Cylichna species 10, 11
Cylichnina species 11
Cymatosyrinx limatula 24
Cymatosyrinx vaughanensis 7, 23
Cypraeolina lacrimula 12

D
delessertii, Conus 20
Dentalium attenuatum 10, 13
Dentalium (Laevidentalium) sp.
aff. D. callipeplum 7, 13
depressa, Solariella lacunella 45
diaphana, Vitrinella 46
diluvianus, Conus 20
"Drillia" foveolata 25
duplicatus, Polinices 13
E
Ecphora zone 7
Epitonium (Nitidiscala)
aduncumlO, 40
Epitonium alaquaense 40
Epitonium species 10, 12
F
Fossarus aff. F. dalli 13
foveolata, "Drillia" 25
fragilum, Sinum 57
Fusinus burnsii 32
Fusinus alaquaensis 31

G
gatunensis, Turritella 10, 41
gausapata, Terebra 10, 16
gaza, Conus multiliratus 19
Glyphostoma macneili 25
guttata, Marginella 28
guppayana, Natica 10, 13

H
haitensis, Polystira 22
"Halia" americana 34
hamadryados, Acteon 11
harrisi, Typhis 38
harveyensis, Conus 18
harveyensis, Turritella cookei 43
henekeni, Mitra 30
I
imitator, Conus 20
inflata, Semicassis 41
internus, Polinices 44
Ithycythara species 11


J
jacksonensis, Olivella 28
jacksonensis, Turritella 43

L
lacrimula, Cypraeolina 12
laqua, Cancellaria (Cancellaria) 26
laqua, Clathrodrillia? 23
laqua, Conus 19
laqua, Mitrella communis 36
laqua, Terebra (Strioterebrum)
alaquaensis10, 16
laqua, Solariella 45
laquanus, Phos blountanus 35
Latirus waltonensis 33
leonensis, Cancellaria reticulata 26
leonensis, Turritella subannulata 43
limatula, Cymatosyrinx 24
limatula, Marginella 29

M
macneili, Glyphostoma 25
major, Solariella 45
maoensis, Marginella
(Leptegouana) 29
Marginella (Serrata) aureocincta 12
Marginella (Leptegouana)
blountensis 29
Marginella coniformis 10, 29
Marginella guttata 28
Marginella limatula 29
Marginella (Leptegouana)
maoensis 29
Marginella (Leptegouana)
vaughanensis 10, 28
Marginella (Serrata) species 12
mediocris, Mitrella communis 33
melanella species 13
Mitra (Tiara) blountensis 30
Mitra henekeni 30
Mitra stephensoni 30
Mitrella communis 36
Mitrella communis laqua 36
Mitrella communis mediocris 36
Molleria cf. M. duplinensis parva 13
montforti, Busycon 12
Muricidea? alaquaensis 39
mutica, Olivella 12

N
Natica canrena 13
Natica guppyana 10, 13
Neptunea alaquaensis 33





INDEX


0
ochlockoneensis, Olivella 28
Oliva species 10, 12
Olivella jacksonensis 28
Olivella mutica 12
Olivella ochlockoneensis
(new name) 28
orthopleura, Anachis
(Costoanachis) 38

P
patuxentensis, "Chrysodomus" 34
permenteri, Turritella cookei 10, 43
Phos blountanus 34
Phos blountanus laquanus 35
Phos vaughani 35
Pleurotoma (Gemmula)
vaningeni 10
Polinices (Dallitesta) co&nsis 58
Polinices duplicatus 13
Polinices internus 44
Polinices (Euspira)
propeinternus 44
Polinices tuomeyi 45
Polinices (Euspira) waltonensis 44
Polystira alaquainsis 21
Polystira barretti 22
Polystira haitensis 22
propecoronatum, Busycon 32
propeinternus, Polinices
(Euspira) 44
proteus, Conus 21
pusilla, Tectonatica 13
pygmaeus, Conus 19
Pyramidella species 13

R
Ringicula blountensis 15

S
Sconsia aff. S. striata 13
Semicassis inflata 41
Semicassis (Tylocassis) inflata
waltonensis 40
Serpulorbis granifera? 13
Sinum aff. S. fragilum 57
Solariella altiusulca 45
Solariella lacunella depressa 45
Solariella laqua 45
Solariella major 45
Solariella vaughani 45
stephensoni, Mitra 30
Strombiformis species 13


T
Tectonatica pusilla 13
Teinostoma cf. T. nanum
umbilicatum 13
Terebra (Strioterebrum)
alaquaensis 15
Terebra (Strioterebrum)
alaqua6nsis laqua 10, 16
Terebra (Strioterebrum)
alaquaensis ulaqua 17
Terebra (Strioterebrum)
blountensis 18
Terebra gausapata 10, 16
Terebra (Strioterebrum)
vaughanensis 17
trilex, Circulus 13
Triphora species 13
tuomeyi, Polinices 45
Turbonilla species 7, 13
Turritella alaqua6nsis 42
Turritella alaquaensis
vaughanensis 10, 42
Turritella cookei harveyensis 43
Turrittella cookei permenteri 10, 43
Turritella gatunensis 10, 41
Turritella gatunensis
blountensis 10, 41
Turritella jacksonensis 43
Turritella subannulata leonensis
(new name) 43
Typhis acuticostata 38
Typhis harrisi 38
Typhis harrisi waltonensis 38
Tphis species 12

U
uaquala, Cancellaria (Narona)
agria 27
uquala, Agladrillia 24
ulaqua, Terebra (Strioterebrum)
alaquaensis 17
Urosalpinx? vaughanensis 38

V
vaningeni, Pleurotoma
(Gemmula) 10
vaughanensis, Anachis
(Costoanachis) 37
vaughanensis, Conus 20
vaughanensis, Cymatosyrinx 7, 23







64 FLORIDA GEOLOGICAL SURVEY-BULLETIN TWELVE


vaughanensis, Marginella
(Leptegouana) 10, 28
vaughanensis, Terebra
(Strioterebrum) 17
vaughanensis, Turritella
alaquaensis 10, 42
vaughanensis, Urosalpinx? 38
vaughani, Phos 35
vaughani, Solariella 45
Vexillum (Uromitra) alaquaense 30
Vitrinella blountana 46
Vitrinella diaphana 46
Volvula species 11


W

waltonensis, Conus 20
waltonensis, Latirus 33
waltonensis, Polinices
(Euspira) 44
waltonensis, Semicassis
(Tylocassis) inflata 40
waltonensis, Typhis harrisi 38

Y
Yoldia zone 7, 10