Notice of Land and Freshwater Shells. 



The following fresh water species, as determined with the 

 assistance of Messrs. Lea, Binney, and Prime, were also collected 

 in the mountains by Dr. Cooper : 



Melania plicifera Lea 



Limnaea fragilis L. 



humilis Say 



Physa hypnonim L. 



heterostropha Say 



Planorbis trivolvis Say 



parvus Say ? 



Sphserium occidentale Prime ^ 

 Limn sea fragilis L. 



bulimoides L. 



desidiosa S. 



- Hell Gate Kiver. 



Missouri 

 Falls. 



River above the 



Physa heterostropha S. | 



Sphgerium striatinum Lam J 



Leptoxis. 



Amnicola. 



Ancylus. 



Unio luteolus Lam. 



Margaritana margaritifera L. 



This latter was found in the " Missouri River above the Falls, 

 and also in the Spokan River below Lake Coeur d'Alene." It 

 is the purple variety, hitherto only brought from the Pacific 

 coast. 



