33 FOSSILS AND NON-MARINE MOLLUSKS 



Cepolis (Hemiteoohus) varians Menke. 



Helix varians Menke, 1829, Cat. Coll. Malsburg, p. 5; Conch. Cab. ed. II, Helix, 



pi. 109, figs. 1-5. 

 Helix (Helicella) carnicolor (Ferussac) Pfeiffer, 1840, Symb. ad. hist. Hel., p. 37. 

 Hemitrochus hmmastomus Swainson, 1840, Malac, p. 165. 



Fossil, above "Glass Window/' Eleuthera Island, Stations 6 and 27; 

 east side Rum Cay in seolian rocks at Station 19. Living at Nassau, Eum 

 Cay and Eock Island, Bahamas; Florida Keys, Cuba, etc. 



This species represented in the ajolian rock by a number of specimens 

 and fragments, does not appear to differ from the recent shell except in its 

 loss of color. 



Cepolis (Hemitrochus) aga'ssizii n. sp. 

 Plate XII, Fig. 8. 



Fossil at Station 19, in geolian rock on the east side of Rum Cay. 



Shell resembling C. varians Menke, but larger, thinner, and with more 

 inflated whorls; whorls about five and a half, turgid, with an appressed but 

 distinct suture; sculpture of rather strong more or less irregiilar incremental 

 lines, more prominent on the spire; surface polished, color white with two 

 dark bands between the sutures on the spire and, on the last whorl, three, 

 rather broad with narrower interspaces, the most anterior of which is per- 

 ipheral; the base is white; aperture much as in C. varians, the lower and 

 pillar lips reflected over but (in the type shell, not quite mature) not closing 

 a minute perforation in the umbilical region. Height 20.3, max. diameter 

 18, min. diameter 16 mm. 



A single partly defective specimen of this species was obtained. It is 

 larger than any of the known living species of Hemitrochus and so charac- 

 teristic that I felt warranted in naming it after Prof. Alex. Agassiz, whose 

 studies of the Bahamas have been so extensive. 



Cepolis (Plagioptycha) inaguana variety subandrosi Dall, nov. 



Fossil on small unnamed key south of Reids Cay, Middle Bight, Andros 

 Island, at Station 14. 



Shell like C. inaguana Dall, but larger, with the pillar-lip broader and 

 with traces of a narrow dark band just behind the suture at the aperture; 

 behind this a subequal pale band, and behind the latter a broad band, more 

 or less dark, extending to the next suture. Height 7.5; max. diameter 13.0; 

 min. diameter 9.35 mm. 



A single specimen was found as above. 



