274 



PROCEEDINGS OF THE ACADEMY OF 



[1898. 



right angles to the trunk or limb, and as the shell is always more or 

 less dirty, the resemblance to a thorn is so astonishing that we 

 doubtless passed by thousands of them, never dreaming for a mo- 

 ment that they were Cylindrellas." 



Mr. Uselma C. Smith found B. elongata living on limestone cliffs, 

 upon which the white shells hung like stalactites, for which he at 

 first mistook them. 



Subgenus Urocoptis Beck. 



Type V. cylindrus (Chemn.), PI. XVIII, fig. 11 (axis) and PI. 

 XVII, fig. 5 (dentition). 



Section Urocoptis, s. s. 



Species of Jamaica. 



U. amethystina (Chitty). 



U. aspera (Ad.). 



U. baquieana (Chitty). 



U. brevis (Pfr.) [C F.]. 



U. camea (Ad.). 



U. cylindrus (Chemn.). 



V. gravesii (Ad.). 



U. lata (Ad.). 



U. megacheila (Chitty). 



V. nobilior (Ad.). 



U. procera (Ad.). 



U. rosea (C. B. Ad. not Pfr.) 



[C F., B., S P., P V.]. 

 U. sanguinea (Pfr.) [C F.]. 

 U. zonata (Ad.). 



U. adamsiana (Pfr.). 

 U. arcuata (W. & M.). 

 U. crenata (W. & M.). 

 U. eugenii (Dohrn). 

 U. eximia (Pfr.). 

 U. fiammidata (Pfr.). 



Species of Hayti. 



U. gruneri (Pfr.). 

 U. gnigouana (Petit). 

 U. mabvja (Weinl.). 

 U. malleata (Pfr.). 

 U. menkeana (Pfr.). 

 U. pundurata (Pfr.). 



Section Cochlodinella Pils. & Van. 



Type U. poeyana (Orb.). Radula with 12.1.12 teeth, which are 

 typical for the genus in form, but decrease rather rapidly. 



Species of Cuba and Florida. 



U. angulifera (Gundl.). 

 U. atropui-purea (Arango). 

 U. goniostoma (Gundl.). 

 U. illamellata (Wright). 

 V. jejuna (Gld.). 

 U. lactaria (Gld.). 



U. mamillata (Wright). 



U. mixta (Wright). 



U. paradoxa (Arango). 



U. poeyana (Orb.) [B., P V.]. 



U. presasiana (Pfr.). 



U. variegata (Pfr.). 



