Mollusca of Grenada. 437 
conic, sharp; aperture oblong oval; peristome acute, not ex- 
eg columellar margin reflexed over the narrow umbi- 
icus. The dimensions given above are those of a typical 
example. — | 
This shell is probably nearest to B. tenuissimus and B. se- 
puleralis. It is larger than either of those species, and ap- 
proaches to B. iliaceus in some respects. 
7. Tornatellina lamellata, Pot. & Mich. 
The Grenada shell to which the name 7. Funckz is applied 
in Bland’s list (1861) is identical with the form from Trinidad 
which has recently been described by Dr. Pfeiffer as 7. Blan- 
diana, and which I refer to the 7. lamellata of Potiez and 
Michaud. 
8. Stenogyra caracasensis, Reeve. 
9. Stenogyra octona, Chemn. 
10. Stenogyra plicatella, Guppy. 
The description of this species will be found under Part ITI., 
Trinidad. The Grenada specimens are intermediate between 
the vars. a andy. ‘They were probably included in Bland’s 
list as St. subula, Pfeiff. 
11. Ennea bicolor, Hutton. 
12. Succinea approximans, Shuttl. 
13. Cyclotus grenadeisis, Shuttl. 
This is very nearly allied to C. rugatus, Guppy. It may be 
distinguished by the comparative smoothness of the last whorl, 
upon which, in C. grenadensis, the wrinkled strize become ob- 
solete. ‘The present species is of a lighter colour than C. 
rugatus. 
| 14. Helicina Heater, Pf. 
I did not collect this species. 
Part III. TRINIDAD. 
With one exception, the species now described have not 
hitherto been recorded from Trinidad; and most of them are 
minute and of rare occurrence. Stenogyra_ plicatella was in- 
cluded in my list in the ‘ Annals’ (ser. 3. vol. xvii. p. 50) as 
Bulimus octonoides, Adams, from which, however, I find it is 
very different. Zonites Guildingit, Helix bactricola, and Heli- 
cina tgnicoma inhabit the mountains of Aripo. 
The proportion of minute species of shells in Trinidad is 
