OF CONCHOLOGY. 87 



No. 69. Anculosa cincinnatiensis, Lea. 



This shell is stated to be the young of A. tintinnabulum, Lea, 

 which is excluded from the synonymy of A. subglobosa. As a 

 partial reason, it is asserted, on the authority of Mr. U. P. 

 James, that the true tintinnabulum is found in the Ohio River. 

 The shells alluded to must be a form of A. prcerosa mimetic of 

 tintinnabulum, which is of rather frequent occurrence. Mr. J. 

 G. Anthony, who resided many years at Cincinnati, did not find 

 tintinnabulum in the Ohio, but he did find Cincinnatiensis, and 

 satisfied himself that it is the young of prcerosa. 



No. 71. Anculosa subglobosa, Say. 



I believe that A. virgata, Lea, has not been correctly identi- 

 fied, or it would scarcely be said to differ from A. subglobosa and 

 to = vittata. The latter species it does not resemble at all. I 

 am fully convinced that A. subglobosa and A. tintinnabulum are 

 the same species, as I have examined thousands of specimens 

 from many localities. 



No. 72. Anculosa tryoni, Lewis. 



This I believe to be A. tceniata, Conrad, which does not ex- 

 clusively "belong to a different system of drainage." A large 

 number of species of Strepomatidce are common to the waters of 

 the Alabama and the Tennessee Rivers, and among them is 

 tceniata. 



Figures 101, 102 in Am. Jour. Conch, ii, p. 133, which Dr. 

 Lewis says are varieties of Tryoni figured as tceniata, were drawn 

 from specimens collected by Dr. Showalter in the Coosa, a tri- 

 butary of Alabama River ! 



No. 7*. Anculosa virgata, Lea. 



Evidently unknown to Dr. Lewis. See No. 71. 



No. 75. Angitrema verrucosa, Raf. 

 Lithasia fuliginosa is very different. 



No. 76. Euryoelon anthonyi, Budd. 



Lithasia Tuomeyi which Dr. Lewis thinks is the same species, 

 undoubtedly belongs to the genus Lithasia. Euryccelon {Ancu- 

 losa) turbinata is a good species ; I have examined an extensive 

 series of different stages of growth. The quite young shells re- 

 semble the young of E. (-4.) crassa, Hald., but are more disk- 

 like in shape, being quite depressed, wide, and with a sharp 

 carina. 



No. 82. SOMATOGYRUS CURRIERIANUS. 



iS. parvulus and S. aureus are made synonyms. I think it 



