1914.] NATURAL SCIENCES OF PHILADELPHIA. 371 



Succinea oregonensis Loa. 



Taken at White's Spring, west of Ward; east side of Bitter Root 

 River, near Charlos; Ward; near Lake Como, at an elevation of 

 6,500 feet; Darby, Mont. 



Succinea nuttalliana Lea. 



Was collected at Gold Creek, foot of Ward Mountain, at Ward; 

 Grantsd^le; Darby, Mont. 



Planorbis parvus Say. 



This shell was taken at east side of Bitter Root River, near Charlos; 

 Grantsdale, Mont. 

 Planorbis umbilicatellus Ckll. 



Collected at west side of Bitter Root River, near Ward, and at 

 W^ard, Mont. 



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