318 Physical Geograjohy, etc. 



Pupa. 



Strophia mumia Brug., ... L. Bk., Cuba. 



Turk Is. 



Strophia losto ma Ffr., .... Turk Is., Gt. luagua, . Cuba. 



Strophia iucanaBinn. , .... Is. East, . . Florida Keys. 



Cuba. 



Strophia marmorataVh., . . . Gt. Bk., Cuba. 



Strophia cyclostoma Kiist., . . Gt. Bk., Cuba. 



Strophia Cumingiana Pfr., . . Is. East, Cuba. 



Leucochila fallax* Saj^ , . . Is. East, .... Bermuda, 



Turk Is., . . Florida, Cuba, 

 Gt. Inagua, .... Haiti. 



Leucochila pellucidaVir.^ . . . Turk Is., Gt. Bk., Bermuda, Texas? 



Cuba, Haiti. 



Orthalicus undatusf Brug., . Gt. Bk., . . Florida, Cuba. 



SucciXEA ZwieoZa Gould, . . . Gt. Bk., . . Texas, Florida, 



Haiti. 



Glandix a. 

 Oleacina solididaVfr., .... Gt. Bk., Cuba. 



The distribution shown in the foregoing list proves in a 

 marked manner the alliance of the Bahamas, and of the 

 Great Bank especially, with Cuba. The numerous repre- 

 sentatives of Polymita and of StropJiia^ and the occurrence 

 of Polygyra., TJielidomus and Melaniella on the Great Bank 

 only (all three groups unrepresented in Haiti) afford similar 

 proof, while the development of Plagioptycha in the Turk 

 Islands and Great Inagua, with the fact that P. Albersiana 

 and disculus are common to them and Haiti, appears to indi- 

 cate their connection with the latter island. 



Dr. Cleve (Geology of the N. E. West India Islands, 

 Stockholm, 1871) mentions that Anegada (on the Virgin 

 Bank) is geologically in all respects different from the other 

 Virgin Islands, that it lies northwest to southeast (the 

 others extending from west to east) and has a close resem- 

 blance to the Bahamas. The land shells of Anegada, how- 

 ever, in common with those of the other islands on the 



* I include, for the present puvpo.se, the forms known as marginatus and nitidulus. 

 t A single specimen in the cabinet of Mr. Rawson. said to be from the Biminis. 



