NORTH AMERICAN CONCHOLOGY. 



197 



var. S. vermeta Say. 

 250 campestris Say. 



Cochlohydra campestris Fer. 

 250 Grcenlandica Beck. 



250 inflata Lea. 



250 Oregonensia Lea. 



250 ovalis Say. 



var. Cochlohydra ovalis Fer. 



New York. 



Greenland. 

 Carolina. 

 Oregon. 

 New York. 

 Ohio. 



