On the Flora and Fauna of Santa Cruz. 123 



Species xow livixu ix, and peculiar to, Sais^ta Cruz. 



Cistula riifilahris, Beck. — Allied in many respects to Chon- 

 droponia Julieni, Pfr. of Sombrero. 



Cyliudrella cliordata, Pfr. {Traclielia.) 



Species now living in Santa Cruz and elsewhere. 

 Chotidropoma Santa-cruzense, Pfr. 



* Micropliysa vortex, Pfr. Also, St. Tliomus. 



* Bulimulus f rater ctilus, Fer. 



* B. elongatus, Bolt. 



* B. niarginatus, Say. 



* Pupa pellucida, Pfr. 



* Succinea Riisei, Pfr. 



With regard to the genera of the semi-fossil species, I may 

 remark, Thelidomus is characteristic of Cuba and Jamaica, is 

 represented in Porto Eico and the Virgin Islands, but has one 

 species only in the Caribbees, T. discolor, Fer, 



Plagio]}tycha belongs to Hayti, and Garacolus to Cuba and 

 Hayti, with a representative in Porto Kico, but neither in the 

 Caribbees. 11- 



Stropliia, with numerous species in Cuba and the Bahamas, 

 several in Hayti, Porto Eico and the Virgin Islands, does not 

 occur in the Caribbees. One siaecies, however, lives in Cura9ao 

 and Buen Ayre. The impression only of a species, is found in 

 the jjhosphatic lime-rocks of Sombrero. 



* These species, more or less widely distributed, cannot be said to be characteristic of the 

 faunas of any of the islands. 



