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• a g S 6 "r J 



^ < ■£= o S- o g. « i 



< t I I ". I S I a 



HELICEA. ^ i S 3 ! J » o I 2 



Pineria, Poey * * * 



Beailiina^ Poey. 

 Leucochila * * * » * * * 



fallax^ Say. 

 Strophia, Alb * ** * * *? * 



mumia^ Brug. 

 Ennea, H. & A. Ad * * 



bicolor, Gould. 

 Streptaxis, Gray * ** 



contusus, Fer. 



F. SUCCINEA. 



SiMPULOPSis, Beck * * * * * 



sulculosa^ Fer. 

 SucciNEA, Drap. 

 Amphibulima, ('Lam. ) Blainv. * 



paiula, Brug. 



Succinea, s. str * * * * *»* * *^ 



obliqua, Say. 



■ Brachyspira, Pfr * * 



tigrina^ Lesueur. 



Omalonyx, Orb * * 



unguis^ Fer. 



In the following pages I offer a more detailed description of 

 the peculiar features of the distribution of the inoperculates, 

 in the different West Indian subprovinces. 



1. Cuba, the Isle of Pines ^ the Bahamas and Bermudas. In 

 this subprovince there are very many peculiarly West Indian 

 forms. The subgenera of Helix most characteristic of Cuba 

 are: Eurycampta {H. Bonplandi, Lam.), Cory da {H. alauda, 

 Fer.), Thelidomus {H. auricoma, Fer.), Polymita [H. muscaritm, 

 Lea), Polydontes {TI. im.perator, Montf.), and Caracolus {H. 

 Sagemoiv^ Beck). In the Bahamas, Plagioptycha, which belongs 

 rather to Haiti, is represented by H. Bahamensis, Pfr., and 

 other species. 



Liguus [L.fascioAus^ MiilL), found also in Florida and the 

 adjacent Keys, confined in the Islands to Cuba and Haiti, has 

 most species in the former. Several of the subgenera of 



