280 UROCOPTIS, S. G. GONGYLOSTOMA. 



Bahamas: Nassau, New Providence (Poey). 



Cyl. bakamensis PFR., Malak. Bl., vii, 1860, p. 214, pi. 2, f. 

 8-11; Monogr., vi, p. 381. CROSSE & FISCHER, Journ. de 

 Conch., 1870, pp. 11, 25 (teeth and jaw). 



Stands nearest to C. dominicensis, but is more lengthened, 

 and the last whorl is not compressed " (P/V.). 



I have not seen typical bahamensis, of which the original 

 description and figures are copied. 



Var. providentia Pils. n. v. PI. 65, figs. 21, 22. Many 

 specimens from Nassau before me differ from Pfeiffer's 

 description in being larger, with coarser and more spaced 

 ribs. On the fourth whorl from the base there are 

 15 to 17 ribs, parted by intervals about three times 

 their width; on the last whorl or two the ribs are more 

 widely spaced. The shell is dull white, opaque, with some 

 indistinct gray mottling. The neck is moderately long; the 

 lip is flatly reflexed and rather wide. The axis is nearly 

 straight. Out of twenty-two specimens, only one retains the 

 apex entire, nearly all being rather widely truncate. 



Length 12.5, diam. 2.4 mm.; whorls I9y 2 (entire). 



Length 12, diam. 2.5 mm. ; whorls 11. 



Length 9.8, diam. 2.3 mm. ; whorls 9. 



This form is very closely related to U. plicata of western 

 Cuba. The Haitian dominicensis, with which Pfeiffer com- 

 pares bahamensis, belongs to Brachypodella. The radula of 

 var. providentia has 5.2.1.2.5 teeth, similar to those of 

 U. plicata, but the posterior angles of the basal-plates of the 

 centrals are thickened into bosses, more than in plicata. Per- 

 haps U. bahamensis, Bidimulus sepidcralis and Zachrysia 

 provisoria in New Providence were imported there years ago 

 from Havana, with plants or in some similar manner. I 

 doubt that their presence is due to natural causes. 



166. U. BLAINIANA (' Gundl, ' Pfr.). PL 65, figs. 5, 6, 7, 8. 



Shell cylindric-turrete, the upper third or half rapidly 

 tapering to the smooth yellowish apex (which is sometimes 

 deciduous; thin, dark brown with a gleam of red-gold in the 

 high-light, sculptured with straight, slightly oblique, snow- 



