B. scopulosa (Gundl.). 

 B. sexdecimalis (Jien.). 

 B. soluta (Pfr.). 

 B. turcasiana (Gundl.). 



1898.] NATURAL SCIENCES OF PHILADELPHIA. 279 



B. gracillima (Poey). 

 B. gundlachiana (Poey). 

 B. marmorata (Shutt.). 

 B. minuta (Gundl.). 



Bahamas. 



B. bahamensis (Pfr.). New Providence, [C F., P V.]. 



Section Strophina Morch. 



B. laterradii (Grat.) [P V.]. San Domingo. 



Section Geoscala Pils. & Van. 



Type B. seminuda (C. B. Ads.). 



A Jamaican group similar to some Brachypodellas except in the 

 dentition, which is of the highly evolved type seen in Mychostoma. 

 The shell differs from this last group in being fusiform, fewer 

 whorled and strongly costate. 



B. inomata (C. B. Ad.). 

 B. robertsi (C. B. Ad.). 



B. seminuda (C. B. Ad.) [B., P 



V.]. 

 B. costulata (C. B. Ad.). 



Subgenus Mychostoma Albers. 



Mychostoma Alb., Die Hel. (edit. 1), p. 207. All species are 

 Jamaican. 

 B. agnesiana (C. B. Ad.) [C F., i B. alabastrine/, (Pfr.). 



P V.]. I B. pearmaniana (Chitty). 



B. alba (Ad.). I B. subula (Fer.) [B.]. 



Subgenus Apoma Beck. 



Apoma Beck, Index Moll., p. 89. 



Casta Alb., Die He!., p. 208. 



A very distinct group, containing two sinistral Jamaican species. 



Type Turbo elongatus (Wood), PL XVIII, fig. 21. 



Von Martens objects to the name Apoma because of its inapplica- 

 bility as implying that other allied groups should be operculated ; 

 but it was obviously given to direct attention to the most conspicu- 

 ous difference between this group and Clausilia, and from this 

 point of view is eminently appropriate. 

 B. gracilis (Wood) [C F., S P.]. | B. elongata (Chemn.) [B., P V.J. 



Genus ANOMA Albers. 



1850. Anoma Alb., Die Heliceen, p. 209, for acus Pfr., gossei Pfr., 

 tricolor Pfr. (the last selected as type by von Martens, Die Hel. 2d 

 edit., 1860, p. 269). Not Anomus Fairm. Hemiptera 1846. 



