272 JOURNAL OF CONCHOLOGY, VOL. 10, NO. 9, JANUARY, I903. 



solider and certainly shorter than yours, and I have seen no other 

 shells from the West Indies which are quite so elongated and thin as 

 yours, though they agreed most perfectly with some of our shells in 

 the United States, but Pilsbry,^ who is the best authority, states that 

 they have in the Philadelphia Academy Collection, West Indian L. 

 ciibensis which absolutely cancels Adams' L. uinhilicatus. and that the 

 species is found through Mexico, Yucatan, etc., that it varies a good 

 deal in form, etc. All the West Indian specimens of Z. aibensis in 

 our collection differ a little from your Barbados specimens as they are 

 a little shorter and more solid than yours, and appear to agree with 

 the Cuban specimens described by Pfeiffer as Z. ciibensis^ 



Mr. Simpson goes on to state that Z. ciibensis (Pfr.) has been quite 

 generally confounded in the United States with Z. hiimilis (Say)., but 

 in the latter the expansion of the columella is narrower and the 

 columella is more plaited or flattened out and straight. Yet here 

 are intermediaries which point to a connection of the two. 



Neritina virginea Linn. — Grenada, Trinidad, South America. 

 Found in the different brackish streams near the coast; in Beckles 

 Spring, St. Michael's, some very pretty colour varieties were found. 



{ci) Dark green, with lighter green spots and markings. 



(/-') Dark green, with yellow bands. 



{c) Dark green, with red bands. 



{d~) Black, with brownish spots. 



Table of Distribution of Species on following Page. 



I Proc, Acad. Nat. Sci. Philadelphia, iSoi, p. 32 



