H. A. Pilshry — Mollusca from the Island of Dominica. 35 Y 



B. exiliS Gmel. (11827, 11856, 11851, 11855, 1184'?). 

 The following color-forms are represented: 



(1) Horn colored, baudless (11827). 



(2) Horn colored, having a faint laeripheral band (1184:7, 11851). 



(3) Horn colored, having a couspicuous dark band (11856). 



(4) Having three dark purple-brown bands, the upper and lower bauds wider 



(11855). 



B. nichollsii a. D. Brown. (11850, 11848, 11849). 



A species peculiar to Dominica. 

 Amphibulima patula Brug. (ii828, ii835). 



STENOGYRID^. 

 Stenogyra octona Chemn. (iiS52, ii840). 



VAG-INULID^. 

 Vaginula punctatissima Semper. (ii830). 



Not before reported from Dominica. The black blotches of the 

 ventral surface are much more conspicuous than one would suppose 

 from Sempei"'s figure. 



HELICINIDJE. 

 Helicina rhodostoma Gray. (ii842, ii 853, 11841). 



The usual variations in lip coloring, from yellow to deep red, are 

 represented. 



H. epistilia Guppy. (ii839). 



A single specimen may be referred to this unfigured and rare 

 species. 



H. velutina Guppy. (11837, 11838). 



The specimens are a trifle more depressed than H. rufa Pfr. from 

 Yuma, Haiti, but the difference is so slight that I am wholly dis- 

 posed to consider Guppy's species a synonym of the earlier described 

 Haitian form. Pfeiffer's description of H. rufa is imperfect, as the 

 delicate velvety character of the cuticle is not noticed by him. I 

 have, however, compared specimens from Yuma Avith the Dominican 

 shells, and am satisfied that they are identical. 



NERITID^. 

 Neritina punctulata Lam. (11825). 



The specimens were collected from the Layou River at Bass-en- 

 Ville, at an altitude of about 2000 ft. They are large, and have 

 the mouth-callus of a dull reddish color. 



