26 PALUDINA BENGALENSIS. 



placed by Mrs. Say. There appears to be no 

 reason to doubt the locality of this specimen; 

 at any rate, Say was satisfied upon this point, 

 and I accordingly admit it as indigenous, upon 

 his authority. I have compared the original 

 specimen with shells from Calcutta, and find 

 that it differs as little from them, as they do 

 from each other. It is smaller than the foreign 

 specimens, but I think a larger native shell was 

 mislaid, or placed accidentally among the 

 foreign ones, in the same collection; so that, 

 rather than commit an error, I have chosen 

 the reputed American example for my illustra- 

 tion. If this is not the Bengalensis of La- 

 marck, it must have the name given to it by 

 Say; that of Swainson having been previously 

 given to a fossil species. 



PALUDINA CARINATA, Val 



PLATE 8. 



P. "testa conoidea, tenui, subdiaphana, viridi; anfrac- 

 tibus quinis, longitudinaliter striatis, et transversim cari- 

 natis." VaL 



