406 GEOLOGICAL SURVEY OF THE TERRITORIES. 



Limnea palustris, Muller. 

 Between the Animas and La Plata 2 specimens. 



Columbia Eiver (Nuttall) ; Klamath Lake and Sumner Lake, Oregon ; 

 Ehett's Lake and Wright's Lake, California (Neivberry); Hell-Gate 

 Eiver and Missouri Eiver above Falls (Cooper). Circumpolar. 



Limnea Kuttalliana, Lea. 

 Between Animas and La Plata Eivers 75 specimens. 



Eemarks. — 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 Eiver Valley 10 specimens. 



Lake Osoyoos, Washington Territory (Lord); Missouri Eiver above 

 the Falls (Cooper) ; Yellowstone Eiver (Rayden). Eastern United States 

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

 western lists. 



Limnea catascopium, Say. — New England to Lewis [SnakeJ Eiver, and 

 through British America (Binney) ; Lake Utah (Burton) ; Idaho (?). 



Limnea Binneyi, Tryon. — Hell-Gate Eiver, Montana (Binney). 



Limnea emarginata, Say. — New England to Washington Territory 

 (Auct). 



Limnea bulimoides, Lea. — Oregon (Nuttall ; Rayden). 



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 Eiver, Montana (Cooper). All over the continent. 



? Limnea 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 CONCHIFERA. 



Order DIMYARIA. 

 COEBICULAD^E. 



Spliwrium striatinum, Lamarck. — Hell Gate Eiver and Missouri Eiver 

 above the Falls (Cooper) ; Humboldt Eiver, Nevada (Hepburn). East- 

 ern North America. 



Splicerium occidentals, Prime. — Hell-Gate Eiver (Cooper). Northern 

 States and Canada. 



Sphwrium dentatum, Hald. — Oregon (Nuttall). 



