20 GEOGKAPIIICAL CATALOGUE 



370 Physa triticea Lea. 



Shasta Co., Cal. ; South and East Oregon. 



371 Physa concolor Hald. 



" Oregon" probably young of another. 



372 Physa Traskii Lea. 

 Los Angeles River, Cal. 



373 Physa Blandii Lea. 

 Marys ville, California. 



374 Aplexus hypnorum Linn. 

 Montana? Russian Am. circumboreal. 



375 Aplexus hordaceus Lea. 



Near Puget's Sound, W. T. ; Vancouver's I. 



376 Planorbis suberenatus Cpr. 

 Oregon ; Wash. Ter. ? Vancouver's I. 



377 Planorbis gracilentus Old. 

 Colorado Desert, California. 



378 Planorbis tumens Cpr. 



San Francisco to Petaluma; Mazatlan. 



379 Planorbis glabratus Say. 

 New Mexico ? (=sinuosus Bourg.l) 



380 Planorbis Oregonensis Tryon. 

 Nevada; Oregon; Idaho. (Hot spring.) 



381 Gyraulus vermicularis Old. 

 Walla Walla, W. T. ; Oregon. 



382 Gyraulus parvus Say. 



Ruby Valley, Utah ; Montana ; Eastern States. 



383 Helisoma ammon GUI. 



Colorado R. ; Kern Lake to Klamath Lake. 



384 Helisoma corpulentus Say. 

 Columbia River, east to Lake Winipeg. 



385 Helisoma trivolvis Say. 

 Whole United States ; Cuba. 



386 Menetus opercularis Old. 

 Santa Cruz, Cal., to Str. Fuca, W. T. 



387 Carinifex Newberryi Lea. 



Clear Lake, Cal., to Klamath Lake, Or. 



388 Pompholyx effusa Lea. 

 Carson River, Nev., to Pit River, Cal. 



389 Ancylus Kootaniensis Baird. 

 Spokan to Kootanie River, W. T. 



390 Ancylus altus Trym. 

 Klamath River, California. 



391 Ancylus Newberryi Lea. 



Klamath Lake, Oregon. ' 



