On the Flora and Fauna of Santa Cruz. 123 



Species xo\\' livix(; ix, axd peculiar to, Saxta Cruz. 



Cistula rufilabris. Beck. — Allied in many res})eets to Clion- 

 droponia Julienl, Pfr. of Soml^rero. 



Cylindrella clwrdata, Pfr. {Tradielia.) 



Species xow livixg ix Saxta Cruz axd elsewhere. 

 CJiondropoma Santa-criizense, Pfr. 



* Microjjhysa vortex. Pfr. Also, St. Thomas. 



* Bidiniulus f rater cuius, Per. 

 '^ B. elo)igatus, Bolt. 



* B. inargi)iatiis. Sav. 



* Fiipa pellucida, Pfr. 



* Succinea RiiseL Pfr. 



Witli 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, Per. 



Plagioptyclia belongs to Hayti, and Caracolus to Cuba and 

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

 Caribbees. ; : 



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 species, however, lives in Cura9ao 

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

 the phosj^hatic lime-rocks of Sombrero. 



* These sjiecies. more or lesg widely distributed, cannot be said to be characteristic of the 

 lunas of anv of the islands. 



