DlstrUmtion of Land Shells in the West Indies. 241 



The following, not in mj Catalogue, belong to the different 

 Islands named. 



Helix castrensis Pfr. Porto Rico. (var. ? oiH. lima.) 

 Clii'OBdropoma terebra Pfr. " 

 Macroceramus microdon Pfr. Yieque, Lillienskjold ! 

 Helix raarginella Gmel. Culabre, " 



Biiliraus elongatus Bolt. " " unusually fine 



specimens ; color of interior of aperture and columella very dark. 

 Choanopoma senticosum ? Sliuttl, " " 



Oleacina subtilis Shuttl. in litt., St. Thomas ; allied to 



0. sulculosa Pfr. of Porto Rico. 

 Bulimus marginatus Say, St. Croix. 



Pupa pellucida Pfr., " also Cuba and Jamaica. 



Bulimus elongatus Bolt. Tortola. 



Megalomastoma Antillarum Sowb. " 

 Cbrondoporaa Julieni Pfr. Sombrero. 



It may be remarked that the land shell fauna of the Porto 

 Eico sub-province is distinct and its limits well defined, so much 

 so, indeed, as to warrant the inference, that the islands com- 

 prised in it were, at a former period, more closely connected, if 

 not united. 



In connection with the Geology of Anguilla, the remarks 

 of Professor Cope (Proc. Acad. Nat. Sci. Phila. 1868, p. 313), on 

 the bones and teeth of a large Eodent from the cave deposits of 

 that island, are very interesting. He thinks, '' That its discovery 

 on so small an island, with others of like character, indicated that 

 the Caribbean continent had not been submerged prior to the 

 close of the Post-pleiocene, and that its connection was with the 

 other Antilles, while a wide strait separated it from the then com- 

 paratively remote shores of North America." 



Mr. Julien (Annals YIIL, 251, 1866) mentions the occurrence 

 at Sombrero of the fossil remains of land-turtles, which were re- 

 ferred by Prof. Jeffries Wyman to three new extinct and gigan- 

 tic species similar to those of the Grallapagos Islands. (See Cope 

 in Proc. Acad. N. S. Phila., 1868, p. 180.) 



