176 Remarks on the Habitats 



Remarks on the Habitats of certain species of Land Shells. 

 By C. B. Adams, Professor of Zoology in Amherst Col- 

 lege, Massachusetts, and Edward Chitty, Chairman of 

 Quarter Sessions, Jamaica. April, 1851. 



In the following catalogue of the shells of Jamaica, somo 

 speies care enumerated which we have not yet been able to 

 find in the island. Some described species are doubtfully 

 identified with our specimens. Others,, which are clearly iden- 

 tical with Jamaica shells, have been referred by authors to 

 other habitats. In the hope of eliciting information from any, 

 who may be more particularly acquainted with the facts, we 

 invite the attention of our readers to such species. 



The following species, said to inhabit Jamaica, we have 

 not found. Cyclostoma labeo has been described by many 

 authors as a Jamaica species. It is very unlike any shell that 

 we have seen or heard of in Jamaica. Cyclostoma asperu- 

 lum, Sowb., may perhaps be identical with some of our shells. 

 Its affinities confirm the statement of its habitat. As to Cy- 

 clostoma corrugatum, see C. C, page 141. 



Trochatella Greyana Pfr. and Helicina Gossei Pfr. we 

 have not identified. Helicina picta Fer., said to occur both 

 in Martinique and in Jamaica, we have excluded from the 

 catalogue. Cylindrella alabastrina Pfr., a sinistrorsal vari- 

 ety of C. Humboldtiana Pfr., and a uniformly white variety 

 of C. variegata Pfr., Cuban species, are also said to occur in 

 Jamaica, but we have not -yet identified them. 



Bulimiis rvfescens Gray and Helix Martiniana Pfr. are 

 also unknown to us. The latter is referred to Jamaica on 

 the authority of Attanasio, a dealer who collected some of 

 the shells of Jamaica during a visit to the island. On the 

 same authority H. Okeniana Pfr. is said to occur at Savanna- 

 la-mar. Having seen a specimen kindly loaned to us by Mr. 

 Cuming, we think it distinct from any of our shells. It ap- 



