13 



SECTION III.— CONCHIFERA LAMELLIPEDA. 

 CONCHiE. 



CONCHA FLUVIATILES. 



555 Cyclas 



552 " 

 5.52 a. " 

 557 " 



553 •' 



calyculata, 

 cornea, 

 rivalis, 

 fontinalis, 

 lacustris, 

 3 



Drap., Bordeau.v. 



Lam., R. Thames, Eng. 



Drap., France. 



U it 



" Europe. 



