Cerion degeneri Clench, 1948

Original Description

"Cerion degeneri new species

(Fig. 4-6)

     Description. - Shell cylindrical, smooth to finely ribbed, and rather light in structure. Umbilical chink small and partially covered by the reflected lip. Color a dull milky-white with rather numerous axial bars of reddish-brown. Interior of aperture a rather dull whitish-brown. Parietal tooth is strong and follows back about one-half whorl. Columellar tooth is small and relatively inconspicuous and follows back about one half a whorl. Sculpture consists of rather fine and irregular growth lines which, on a very few specimens, become rather well developed on the body whorl, forming definable ribs. No spiral sculpture. Whorls 10, slightly convex, nuclear whorls (2½) china-white, smooth to minutely ribbed. Remaining whorls generally smooth though an occasional specimen shows ribbing on the body whorl. Spire extended, the first 7 whorls forming an acute apex, produced at an angle of 70°. Remaining whorls nearly parallel-sided. Aperture subovate with a thickened though narrowly reflected lip. The lip is particularly thickened over the umbilical chink. Fully mature specimens have a strongly developed ridge which connects the two lip extremities.

 Length

. Width

Aperture

 ---------

---------------

-------------------

 22.8

9

5.8 X 4.1      mm.

Holotype

 28.5

10

6.5 X 4.3

"

Paratype

 24.2

8.6

7.0 X 4.5

"

"

 24.3

9.5

6.5 X 4.2

"

"

 21.8

8.1

6.0 X 4.0

"

"

     Holotype. - Museum of Comparative Zoölogy, no. 175065, Fleeming Point, New Providence Island, Bahama Islands. Found on an "isolated island" in a mangrove swamp. Otto Deneger and A. Langlois collectors, February 25, 1946. Paratypes in the Museum of Comparative Zoölogy and the Museo Poey.

    Remarks. - This species does not appear to be closely related to any other on the island of New Providence. It is probably a member of the Cerion gubernatoria Crosse group. It differs from gubernatoria by being far more attenuated, by being nearly smooth, and by the numerous color patches of light brown."  (Clench, 1948:50-51)

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