194 PLANORBIS. 



B. Species inhabiting the Atlantic States. 



6. PLANORBIS LENTUS, Say. 



Haldeman, Monog. p. 18, t. 3, figs. 4 — 6. 



This is essentially a Southern species, and, 

 assigned habitats in the North-western States, 

 must be looked upon with some degree of sus- 

 picion. 



7. PLANORBIS GLABRATUS, Say. 



Hald., Monog. p. 11, t. 2, f. 1, 3. 



Inhabits South Carolina, Georgia, Louisi- 

 ana, Iowa; but nowhere common. It does 

 not inhabit Oregon, as stated by Mr. Binney. 

 The Oregon species referred to it is probably 

 PI. subcrenatus, Carpenter. 



(41) 



