20 
370 
371 
372 
373 
374 
375 
376 
377 
378 
379 
380 
381 
382 
383 
384 
385 
386 
387 
388 
389 
390 
391 
GEOGRAPHICAL CATALOGUE 
Physa triticea Lea. 
Shasta Co., Cal.; South and East Oregon. 
Physa concolor /aid. 
“ Oregon”—probably young of another. 
Physa Traskii Lea. 
Les Angeles River, Cal. 
Physa Blandii Lea. 
Marysville, California. 
Aplexus hypnorum Linn. 
Montana? Russian Am.—circumboreal. 
Aplexus hordaceus Lea. 
Near Puget’s Sound, W. T.; Vancouver's I. 
Planorbis subcrenatus Cpr. 
Oregon; Wash. Ter.? Vancouver's I. 
Planorbis gracilentus id. 
Colorado Desert, California. 
Planorbis tumens Cpr. 
San Francisco to Petaluma; Mazatlan. 
Planorbis glabratus Say. 
New Mexico? (=sinuosus Bourg.?) 
Planorbis Oregonensis Tvyon. 
Nevada ; Oregon; Idaho. (Hot spring.) 
Gyraulus vermicularis (Cid. 
Walla Walla, W. T.; Oregon. 
Gyraulus parvus Say. 
Ruby Valley, Utah; Montana; Kastern States. 
Helisoma ammon Gil. 
Colorado R.; Kern Lake to Klamath Lake. 
Helisoma corpulentus Suwy. 
Columbia River, east to Lake Winipeg. 
Helisoma trivolvis Say. 
Whole United States; Cuba. 
Menetus opercularis (id. 
Santa Cruz, Cal., to Str. Fuca, W. T. 
Carinifex Newberryi Lea. 
Clear Lake, Cal., to Klamath Lake, Or. 
Pompholyx effusa Lea. 
Carson River, Ney., to Pit River, Cal. 
Ancylus Kootaniensis Baird. 
Spokan to Kootanie River, W. T. 
Ancylus altus 7Jryon. 
Klamath River, California. 
Ancylus Newberryi Lea. 
Klamath Lake, Oregon. 
