Catalogue of the Terrestrial Shells of Si. Thomas, W. I. 



21i 



require modification : certainly much is to be done in giving 

 the subject precision and elaboration of details. 



In perfecting the science of the geographical distribution of 

 animals, Conchology may, with the greatest facility, render 

 important aid, in consequence of the ease with which great 

 numbers of specimens are collected, transported, and pre- 

 served. 



Catalogue of the Terrestrial Shells of St. Thomas, West 

 Indies. By Thomas Bland, F. G. S., London. Oct., 1852. 



The study of the land shells of the West India Islands has 

 proved the existence of several distinct terrestrial insular fauna?, 

 within the area of the marine Caribbean zoological province. 

 Professor Adams collected in Jamaica about 850 species of land 

 shells, of which three or four per cent, only have been found 

 elsewhere. Increased attention is being devoted to the land 

 shells of the other Islands, and we now contribute a list of those 

 which inhabit St. Thomas. 



It should be explained that ihe numbers printed within 

 brackets, after the numbers of the species, refer to a list in the 

 hands of several gentlemen resident in St. Thomas and else- 

 where, who have collected the shells of that island, and that 

 specimens, with corresponding numbers, have been deposited in 

 the cabinet of Amherst College, Mass., U. S. Specimens of the 

 undetermined species (excepting only No. 13) have been sent 

 to Mr. Hugh Cuming, London, who forwarded them to Dr. 

 Pfeiffer of Cassel for description. We hope to publish in a sub- 

 sequent number of these "Contributions" the names, with refer- 

 ences to the descriptions, by Dr. Pfeiffer. 



The following shells have been described as inhabiting St. 

 Thomas, but we believe erroneously. 



Helix depicta Grat. St. Thomas and New Orleans; Grat. 

 Pfr. Mon. Hel. Yiv. No. 28. 



