368 PROCEEDINGS OF THE ACADEMY OF [Apr., 



This species differs from H. camelus P. and V. by having a caudal 

 mucous pore, a narrow tail, and the penis is narrower, with a gland 

 at the base. The mantle is papillose like H. glandulosa B. and B., 

 but it does not have the "horn" on the tail. 



Oreohelix cooperi Binn. 



This species was collected near Lake Como; north side of Camas 

 Creek Canyon at an elevation of 8,000 feet; south side of Camas 

 Creek Canyon at an elevation of 7,000 feet; north fork of Lost 

 Horse Canyon; Lost Horse Canyon; Medicine Hot Springs; Warm 

 Spring Canyon near hotel; Warm Spring Canyon above Medicine 

 Hot Springs, Mont. 



Polygyra ptychophora Br. 



This shell was found at Bitter Root Valley; Lost Horse Creek 

 near Charles; White's Spring, west of Ward; bluff north side of 

 Bitter Root River north of Ward; north end of Ward Mountain; 

 west side of the Rocky Mountains near Ward; Camas Creek Canyon; 

 north fork Lost Horse Canyon, 8,500 feet; Lost Horse Canyon; 

 east side of the Rocky Mountains at Darby ; Warm Spring Canyon 

 near and below the hotel, west side of the Rocky Mountains; 

 Warm Spring Canyon one mile above Medicine Hot Springs, on the 

 west side of the Rocky Mountains; also one-quarter of a mile 

 below the hotel. 



Polygyra ptychophora Br. form castanea Hemp. 



This color form was taken at Bitter Root Valley; White's Spring, 

 west of Ward; bluff north side of Bitter Root River north of Ward; 

 north end of Ward Mountain; west side of the Rocky Mountains 

 near Ward; near Lake Como; Camas Creek Canyon; north fofk 

 Lost Horse Canyon; at an elevation of 8,500 feet in Lost Horse 

 Canyon; east side of the Rocky Mountains at Darby; Warm 

 Spring Canyon below the hotel, west side of the Rocky Mountains. 



Polygyra devia oregonensis Hmp. 



Was collected at Bitter Root Valley; bluffs near Bitter Root 

 River, north of Ward; Lost Horse Creek near Charlos; south side 

 of Saw Tooth Mountain; west side of the Rocky Mountains, near 



Ward. 



Polygyra devia blandi Hmp. 



This variety was collected near Lake Como, Bitter Root Moun- 

 tains, Mont. 



