Additional Notes on the Geographical Distribution of Land Shells 

 in the West Indies. 



By THOMAS BLAND. 

 Eeprinted from the Annals of the Lyceum of Natural History, Yol. IX., June, 18G9. 



In various papers (Annals YIL, 1861, with Catalogue of Species 

 and Amer. Jour, of Conch, IT., 1866, and lY., 1868)1 have dis- 

 cussed the subject of the Geographical Distribution of the West 

 Indian terrestrial Mollusca, and shown that the Islands, consider- 

 ing the facts of such distribution, may be divided into five sub- 

 provinces, the whole group, in a general sense, being treated as 

 one zoological province. For the sake of brevity, I may refer 

 to the sub-provinces as those of Cuba, Jamaica, Haiti, Porto 

 Eico, and Guadeloupe ; with respect to several of which I now 

 offer some additional information. 



Cuba. — This sub-province includes the Isle of Pines, the Ba- 

 hamas, Turk's Island and Bermudas. An amazing number of 

 species have been discovered in Cuba since 1861, and also in the 

 Bahamas. From the latter, including Turk's Island, 22 species 

 only were enumerated in my Catalogue (1861), while between 70 

 and 80 are now known. The Bahamas species will be the subject of 

 a separate paper, but I may mention that the islands on the Little 

 and Great Bahama Banks are closely connected by their land 

 shell faunas with Cuba, but those to windward of the latter 

 Bank, Inagua especially, have evident relations with Haiti, to 

 which geographically they are nearer. 



Haiti. — The Island of ^avassa, situate 83 miles S.W. from 

 Haiti and 72 E. from Jamaica, belongs to this sub-province. "We 

 are indebted to Mr. Eugene Gaussoin for three species described 

 by Tryon (Amer. Jour. Conch. II., 1866) viz. : — Helix Gaussoini, 

 Chrondropoma Navassense, and Helicina circumlineata. 



Porto Rico. — In this section Yieque and small islands adja- 

 cent are included, and also the Yirgin Islands, with Anguilla, 

 St. Martin, and St. Bartholomew. I am now enabled to enlarge 

 and correct the lists of species from several of the islands. The 



