1914.] NATURAL SCIENCES OF PHILADELPHIA. 369 



Thysanophora ingersoUi Bid. 



Camas Creek Canyon; Lost Horse Canyon at 8,500 feet elevation 

 and Medicine Hot Springs, Mont. 



Polita hammonis Strom. 



Was collected at Hamilton; west side of Bitter Root River near 

 Ward; White's Spring, west of Ward; west side of Bitter Root River, 

 north of Ward; Lost Horse Creek near Charlos; east side of Bitter 

 Root R^iver, near Charlos; Ward; near Lake Como at 10,000 feet 

 elevation; Grantsdale; Darby, Mont. 



Zonitoides arborea Say. 



This shell was found at White's Spring, west of Ward; west side of 

 Bitter Root River, north of Ward; Lost Horse Creek, near Charlos; 

 Gold Creek at the foot of Ward Mountain; Saw Tooth Mountain; 

 north end of Ward Mountain, near Ward, 4,825 feet elevation; 

 east side of Bitter Root River near Charlos; Grantsdale; Camas 

 Creek Canyon; Darby; Medicine Hot Springs, Mont. Some speci- 

 mens were very large. 



Zonitoides nitidus Mull. 



Was collected at White's Spring, west of Ward; Darby, Mont. 



Vitrina alaskana Dall. 



From Hamilton, White's Spring, west of Ward, Gold Creek, at the 

 foot of Ward Mountain, and north end of Ward Mountain, 4,825 

 feet elevation, near Ward; Medicine Hot Springs, Mont. 



Euconulus fulvus Drap. 



This shell was collected at White's Spring, near Ward; Lost Horse 

 Creek, near Charlos; Gold Creek, foot of Ward Mountain; Saw 

 Tooth Mountain; north end of Ward Mountain, at an elevation of 

 4,825 feet; east side of Bitter Root River, near Charlos; Camas 

 Creek Canyon; Darby, Mont. 



Euconulus fulvus alaskensis Pils. 



This variety was collected at Hamilton; west side of the Bitter 

 Root River, near Ward; White's Spring W^est of Ward; west side of 

 Bitter Root River, north of Ward; Gold Creek, at the foot of Ward 

 Mountain; east side of Bitter Root River, near Charlos; at 10,000 

 feet elevation, near Lake Como; Grantsdale, Mont. 



Cochlicopa lubrica Miill. 



From west side of Bitter Root River, near Ward; White's Spring, 

 Ward ^Mountain; Ward, Mont. 



