38 FOSSILS AND I^ON-MARINE MOLLUSKS 



Collected by Messrs. Bean and Riley of the U. S. National Museum, at 

 ' Gregorytown, Eleuthera Island. Types Xo. 173183, U. S. N'ational Museum. 



This species is more like the fossil form from Eum Cay (C. pharcidum 

 Dall) than any of the known living species but is much smaller, more sharply 

 sculptured, and has the gular fold shorter, more oblique, and relatively more 

 prominent. It is notable for its dull, unpolished surface, wliich presents a 

 marked contrast to the polish of the duelosiana group. 



Cepolis (PLAGiorTYCiiA) DUCLOSiAXA variety columbiana Dall, nov. 

 Plate XIII, Figs. 6, 9. 



■ Shell similar to C. duelosiana Ferussac, but smaller, the apex proportion- 

 ately more elevated and pointed; the number of whorls the same, but the gular 

 fold lower, more elongated, less oblique, and closer to the pillar and lower lip. 

 Height 7.5, max. diameter 1-1, min. diameter 13 mm. 



Watlings Island, U. S. Fish Commission. Types No. 109110, U. S. Na- 

 tional Museum. 



Cepolis (Plagioptycha) inaguana n. sp. 

 Plate XII, Fig. 1 ; Plate XIII, Fig. 2. 



Shell small, subturbinate, with four and a half rounded whorls united l)y 

 a strongly marked suture; spire moderately elevated, periphery evenly rounded, 

 base moderately convex with a small perforate umbilicus nearly closed l)y a 

 reflection of the pillar-lip; color olivaceous with a brilliantly polished perios- 

 tracum; nucleus smooth, the remainder of the whorls sculptured with sharp, 

 elevated lines with wider interspaces and oblique curvature, strongest on the 

 earlier whorls but persistent over the whole shell; aperture depressed, ol)li(|U(', 

 the whorl behind it slightly constricted; upper and outer lips simple, thin; 

 pillar-lip reflected over the umbilicus (which it does not quite close) and on 

 the base; there is no indication of a gular fold. Height 7, max. diameter 10.."), 

 min. diameter 8 mm. 



Inagua Island, Bahamas, Lea Collection in the U. S. National Museum, 

 X^o. 105793. 



The most marked characteristic of this little shell, after its small size and 

 sharp sculpture, is the entire absence of a gular fold. What appears to be a 

 larger variety of this, with a bi'oador pillar-lip and coloration of brown bands, 

 was found in the fossil state at Station 11, in the Andros group and named 

 suhandrosi. 



