406 GEOLOGICAL SURVEY OF THE TEREITOKIES. 



Limnea palustris, Muller. 

 Between the Animas and La Plata 2 specimens. 



Columbia Eiver {Nuttall); Klamatli Lake and Sumner Lake, Oregon; 

 Ehett's Lake and Wright's Lake, Calitiornia {Neicberry) ', Hell-Gate 

 River and Missouri River above Falls (Cdojaer). Circumpolar. 



Limnea Huttalliana, Lea. 

 Between Animas and La Plata Rivers 75 specimens. 



Remarks. — Often considered a synonym of L. palustris, with which, 

 in the West, it seems to be co-extensive. 



limnea desidiosa, Say. 



Camp 9 : Hot Sulphur Springs 10 specimens. 



Camp 11 : Blue River Valley ^ 10 specimens. 



Lake Osoyoos, Washington Territory {Lord); Missouri River above 

 the Falls (Cooper) ; Yellowstone River {Hayden). Eastern United States 

 and Mississippi Valley. This shell is called Limnea ohrussa in many 

 western lists. 



Limnea catascoinum, Say. — New England to Lewis [SnakeJ River, and 

 through British America [Binney] ; Lake Utah [Burton) ; Idaho {%). 



Limnea Binneyi, Tryon. — Hell-Gate River, Montana [Binney). 



Limnea emarginata, Say. — New England to Washington Territory 

 (Aiict). 



Limnea hulimoides, Lea. — Oregon [N^uttall ; Hayden). 



Limnea Traski, Tryon. 



Colorado ,. 6 specimens. 



A Californian species. 



Limnea humilis, Say. 



Camp 17 : San Luis Valley 2 specimens. 



Camp 26 : Howardville, Baker's Park 1 specimen. 



Hell-Gate River, Montana [Cooper). All over the continent. 



1 L^.mnea ferruginea, Haldeman. 



Between the Animas and La Plata 2 specimens. 



Oregon [Nuttall). " If not L. ferruginea, it may be new." — Dr. JAS. 

 Lewis, in letter. 



Class CONOHIFEEA. 



Order DIMYARIA. 

 CORBICULAD^. 



8plicerium striatinum, Lamarck. — Hell Gate River and Missouri River 

 above the Falls [Cooper); Humboldt River, Nevada [Sephurn). East- 

 ern North America. 



Splicerium occidentale, Prime. — Hell-Gate River [Cooper). Northern 

 States and Canada. 



Sphcerium dentatum, Hald. — Oregon [Hfuttall], 



