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Group Title: United States National Museum
Title: A new marine shell of the genus Xenophora from Florida
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Permanent Link: http://ufdc.ufl.edu/UF00086048/00001
 Material Information
Title: A new marine shell of the genus Xenophora from Florida
Series Title: United States National Museum
Physical Description: 2 p. : ill. ; 24 cm.
Language: English
Creator: Bartsch, Paul, 1871-1960
United States National Museum
Publisher: Smithsonian institution, United States National museum,
Smithsonian institution, United States National museum
Place of Publication: Washington D.C
Publication Date: 1931
Copyright Date: 1931
 Subjects
Subject: Xenophora   ( lcsh )
Genre: non-fiction   ( marcgt )
 Notes
Statement of Responsibility: by Paul Bartsch.
General Note: Cover-title.
 Record Information
Bibliographic ID: UF00086048
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 22715327

Table of Contents
    Front Cover
        Front Cover 1
        Front Cover 2
    Main
        Page 1
        Page 2
        Page 3
        Page 4
        Page 5
        Page 6
    Back Cover
        Page 7
        Page 8
Full Text
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A NEW MARINE SHELL OF THE GENUS XENOPHORA
FROM FLORIDA


By PAuI BARTSCH
Curator, Division of Mollusks and Cenozoic Invertebrates
United States National Museum


During the summer of 1931, Dr. William H. Longley, executive
officer of the Marine Biological Laboratory of the Carnegie Insti-
tution at the Tortugas, Fla., made a number of deep-sea dredge hauls
south of Loggerhead Key. In one of these hauls two large living
Xenophora were obtained in 98 to 125 fathoms of water, which prove
to belong to an undescribed species, which I take pleasure in naming
for Doctor Longley.

XENOPHORA LONGLEYI, new species
PLATE 1

Shell unusually large for the genus. The type has about 8
whorls; as the apex is somewhat fractured, the exact number is
slightly in doubt. The shell is of grayish-white coloration. The
whorls are broadly conic and overhanging, particularly so in the
later turns, where, for example, in the last whorl a very broad
peripheral fold extends obliquely outward. The basal portion of
the turns is more or less ornamented with fragments of attached
shells, in this instance rather less so than is usual in the genus.
The actual sculpture on the upper side of the turns consists of
retroactively curved, irregular, incremental lines, which lend a some-
what wavy appearance to the shell. There are also wavy, closely
spaced, fine, threadlike elements placed at right angles to the incre-
mental lines, which give to the surface a decidedly ripple-marked
effect. The periphery of the last whorl has a decided curtainlike
flap, to which I have alluded above. The basal side of this flap is
smooth and porcelaneous white, while the rest of the base has a
reddish tinge, but here and there it shows an indication of the
incremental lines. The base of the shell is moderately openly
umbilicated. The basal wall is moderately convex and is marked

No. 2917.-PROCEEDINGS U. S. NATIONAL MUSEUM, VOL. 80, ART. 17
82798-31







2 PROCEEDINGS OF THE NATIONAL MUSEUM VOL.80: ART. 17

by rather strong, sublamellar, retroactively curved, riblike elements,
which join the outer peripheral flap in a series of slender buttresses.
In addition to this, the base is marked by fine, irregularly placed,
spiral lirations. The aperture is of irregular shape. The basal lip
is decidedly sigmoid, forming an even, concave curve from the flap
to the columella. The parietal wall is covered with a glazed callus,
while the outer lip is constituted by the continuation of the broad
parietal flap.
Type.-U.S.N.M. No. 382689 measures: Altitude, 85 mm.; great-
est diameter, 144 mm. The topotype is entered as U.S.N.M.
No. 382690.
Remarks.-U.S.N.M. No. 92922 contains four badly worn and
battered specimens dredged in 1885 by the United States Bureau of
Fisheries steamer Albatross at Station 2625 in 247 fathoms on gray
sand bottom; bottom temperature, 460 F.; 75 miles south by east,
/2 east off Cape Fear, N. C. These specimens in the past were
referred, probably on account of their poor condition, to Xenophora
caribaea Petit, but they are in reality members of the present species.
The present species differs from Xenophora caribaea Petit in being
much larger, less ornamented with borrowed shells, and much more
closely sculptured with much more overhanging whorls, but the
greatest distinguishing characteristics are in the basal portion of the
turn, which in X. caribaea has a spiral keel immediately within the
junction of the peripheral flap and in the basal wall, which is absent
in the present species. X. caribaea lacks the expanded riblets of the
base, which extend as buttresses on the flap in the present species.
From Xenophora conchyliophora Born, the only other Floridian
Xenophora, the present species differs by having the broad peripheral
flap, which is missing in X. conchyliophora. Here, too, the base is
not umbilicated and entirely differently sculptured.


U. 5. GOVERNMENT PRINTING OFFICEs 1931





PROCEEDINGS, VOL. 80. ART. 17 PL. 1


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XENOPHORA LONGLEYI, NEW SPECIES


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