122 0)1 the Flora and Fauna of Santa Cruz, 



Thelidomus incerta, Fer. This occurs, also semi-fossil, in St. 

 Thomas; — its nearest ally is T. notabilis, Shuttl. of St. Jan and 

 Tortola. 



Plagioptycha Santacriizensis, Pfr. Allied closely to P. nemo- 

 ralina, Pet., of St. Thomas, St. Jan and Tortola. 



Bulimulus extincttis, Pfr. 'Seav to B. elongatiis, Bolt., which 

 inhabits Porto Eico, the Virgin Islands, islands on the Anguilla 

 Bank, several of the northern Caribbees, Cnra9ao and Bnen A^a-e. 



Bulimulus Biisei, Pfr. This can scaicely be conii)ared with 

 any known West Indian form. 



Stropliia rudis, Pfr. var. Jaiilahris, Pfr. Allied to species 

 noAv living in Porto Rico and in several of the eastern Virgin 

 Islands. 



Semi-fossil Species, extinct in Santa Cruz, but living 



elsewhere. 



Chondropoma Tortolense, Pfr. A specimen from Santa Cruz, 

 in my cabinet, I referred to this species, which now inhabits Tor- 

 tola and several of the more eastern Virgin Islands. 



Caracohis caracoUa, L. This species is found living in Porto 

 Eico and Vieque ; it is nearly allied to C. sarcocheila, Morch, 

 (J. insititia, Shuttl , and C. excellens, Pf., of Hayti. 



In my Catalogue, Ann. N. Y. Lye, vii, 1861, I included 

 C. onargineUa, Gmel., as occurring semi-fossil in Santa Cruz, but 

 erroneously, as I was assured by the late Mr. Eobert Swift. 



Siiccinea approximans Shuttl. — I referred a si:)ecimen in my 

 cabinet to this species, Avhich occurs in Porto Eico, the A'irgin 

 Islands, and several of the Caribbees. 



