182 AMERICAN JOURNAL 



views that I doubt the determination of the Trinidad shell, speci- 

 mens of which I have not seen. In S. Gruildingi the perforation 

 is much smaller than in II. cellaria, the shell is more depressed, 

 its color and texture different, the number of whorls fewer, and 

 the aperture more rounded. 



12. Zonites implicans, Guppy. Ann. and Mag. June, 1868. 



13. Zonites umbratilis, Guppy. Ann. and Mag. June, 1868. 



Guppy droerves that this and Z. implicans may, upon exami- 

 nation of the soft parts, prove not to have caudal appendages, 

 and will tnen be referrible to Hyalina, not to Zonites. 



14. Helix bactricola, Guppy. Ann. and Mag. June, 1868. 

 Mountains of Aripo. — Guppy. 



15. Streptaxis deformis, Ferussac. 



On trees and on the ground in the woods. Not very abun- 

 dant, but may be found on the Laventille Hills, especiall^on 

 limestone ridges. It also occurs on the Cotoras and other islands 

 in the Gulf of Paria. — Gill, Guppy. Also in Venezuela and 

 Guiana. * 



16. Ennea bicolor, Hutton. 



In the crevices of rocks near streams, in the neighbourhood of 

 Port-of-Spain. — Gill, Guppy. Occurs also in the islands of 

 Grenada and St. .Thomas, and in India. 



17. Bulimus (Plekocheilus) auris-sciuri, Guppy. Ann. 



and Mag. Jan., 1866. 



Found on trees in many parts of the island. — Gill, Guppy. 



In the Proceedings of the Scientific Association of Trinidad, 

 Dec, 1866, Guppy observes that having seen specimens of B. 

 glaber from Brazil closely approaching the Trinidad species, he 

 found difficulty in separating them, and left the question of 

 identity open. I am disposed to consider the species distinct. 



18. Bulimus oblongus, Muller. 



Found in many parts of the island ; abundantly on pieces of 

 land allowed to run into bush in the town of Port-of-Spain. — 

 Gill, Guppy. It occurs also in St. Vincent and Barbados, and 

 is widely distributed in South America. 



19. Bulimus Vincentinus, Pfeiffer. 



