6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 81 



Type.— The type, U.S.N.M. No. 403923, has 2.3 postnuclear whorls 

 and measures: Height, 1.1 mm; greater diameter, 3.4 mm; lesser 

 diameter, 2.6 mm. 



Remarks. — U.S.N.M. No. 403897 contains six additional specimens 

 from the type locality. This species is nearest related to Cerato- 

 discus solutus Simpson and Henderson from La Ferriere, Haiti. 

 It differs from this in being much smaller and in having the nuclear 

 whorls depressed in the general concave surface of the spire instead 

 of elevated, and in having the spiral sculpture much finer, 



CEPOLIS WETMOREI, new species 



Plate 3, Figures 4, 5, 6 



Shell depressed helicoid with a pale brown band at the suture and 

 a broader similarly colored band halfway between this and the pe- 

 riphery. (As all our specimens are dead, it is quite possible that in 

 fresh material these bands will prove to be conspiciously colored.) 

 Nuclear whorls 1.3, slightly rounded, finely granular. Postnuclear 

 whorls 3, well rounded, a little more so near the summit than on the 

 anterior two-thirds, which slope strongly. These whorls are marked 

 by retractively slanting incremental lines, which are of irregular 

 strength and spacing. Suture well impressed, the last whorl is nar- 

 row and slopes strongly toward the base. The base is broadly 

 openly umbilicated and decidedly pinched in on the umbilical area 

 behind the aperture to form a strong oblique tooth within. There 

 is also a deeply impressed pit corresponding to a strong tooth on the 

 inner lip some little distance behind the aperture. The aperture is 

 oval and the outer lip is somewhat expanded, reflected, and thick- 

 ened, the columella being very short. The outer lip is deflected 

 downward near the aperture at the posterior angle. The parietal 

 wall is covered by a thin callus. Within the aperture two teeth are 

 apparent, the one extending from the columella for more than half 

 the length of the basal lip, parallel to it a little behind its edge. The 

 other is a very decidedly elevated, subconical structure springing 

 from the middle of the outer lip, and extending for more than half 

 the width of the aperture across this toward the parietal wall. This 

 is at some distance from the outer lip. 



Type.— The type, U.S.N.M. No. 403908, measures : Height, 9 mm ; 

 greater diameter, 14 mm ; lesser diameter, 11.6 mm. 



Remarks. — There are three additional specimens in this gathering, 

 the largest of which has 5 whorls and measures: Height, 9.3 mm; 

 greater diameter, 15.2 mm; lesser diameter, 12.5 mm. 



