1894. 



PROCEEDINGS OF TBE NATIONAL MUSEUM. 



443 



experience in being drifted to our shores. I may mention in passing 

 tliat every strictly Cuban species — I think without exception — now 

 known to be living- in Florida is an inhabitant of tlie western end of 

 the island, and most of them are known to have a general distribution 

 throughout the western part of it, and especially on its northern shore. 



RELATIONS OF THE TERRESTRIAL AND FLUVIATILE MOLLL'SCAN 

 FAUNAS OF THE GREATER ANTILLES AND THE WINDWARD ISLANDS. 



A careful examination of the lists of genera, subordinate groups, and 

 species of these two areas will reveal the fact that while there is a rela- 

 tionship between the two faunas it is not nearly so close as the one 

 between the faunas of the former region and the continent. 



Land Snails common to Puerto Bico and the Lesser Antilles. 



* Also found in the island of Buen Ayre, of the Leeward Gronp. 

 1 FrenL-h Guiana also. 



' Several of these Steuogyridte and bume other species have probably been introduced through thi» 

 agency of man. 



Fresh-wafer Mollnsls common to Puerto Pico and the Lesser Antilles. 



Specie.s. 



Guade- 

 loupe. 



Planorbis gnadaloapen.->is, Sowb 



.schraiumi. Crosse 



lueidus, Pfr 



Ancylus beani. Bourg 



Aplfccta sowerbyana. A. d'Orb . . 

 Potamopyrgu.s eoronata. Pfr 



Martin- 

 ique. 



Doniin- 

 iia. 



From the above lists it will be seen that there are 14 species of terres- 

 trial and 6 fluviatile mollusks common to Puerto Eico and one or more 

 islands of the Lesser Antilles, while no less than 24 land mollusks 

 belong to that island and some of the other Greater Antilles, and 13 

 fresh- water species. The following tables show the specific relationship 

 between these molluscan faunas of Puerto Eico and the other islands 



