378 
ZOOLOGY. 
surface is smooth, not rugose, when alive, as represented in Dr. Binney's plate, and its color 
is a pale yellowish olive, iisually more or less irregularly blotched with black. — C. 
Family LYMN^AD^. 
LYMNJ^A UMBROSA. 
Lymncza umbrosa, Gould. 
Hab. — Lake Oyosa, on the Okanagan river, near lat. 49° ; Dr. Cooper. 
LYMN^A EMARGINATA. 
Lyrmicca marginata, Say. 
Ilab. — Lake Oyosa, Washington Territory ; Dr. Cooper. 
LYMN^A JUGULARIS. 
Lymnoea jugxdaris, Say. 
Hab. — Lake Oyosa, Washington Territory ; Dr. Cooper. 
PHYSA ELONGATA. 
Plii/sa elotii/ata, Say. 
77(26.— Near Puget Sound ; Dr. Cooper. 
PHYSA HETEROSTROPHA. 
Phym helerostropha , Say. 
^a6.— Ponds in Washington Territory ; Dr. Cooper. 
PHYSA BULLATA. 
Phjsa bullata, Gould, ms. 
77a6. — Lake Oyosa, Washington Territory ; Dr. Cooper 
ANCYLUS CAURINUS, n. s? 
i7ai.— Black river, near Puget Sound ; Dr. Cooper. 
PLANORBIS CORPULENTUS. 
PJanorbis corpulentus, Say. 
77a6. — Lake Oyosa, Okanagan river; Dr. Cooper. 
PLANORBUS TRIVOLVIS. 
Planorbis irivolvk, Say. 
Hab. — Near Vancouver ; Dr. Cooper. 
"Exceedingly abundant in shallow lakes about Vancouver, the dead shells lining the 
shores." — C. 
PLANORBIS PLANULATUS, n. s. 
Hab. — Lakes on Whidby's island ; Dr. Cooper. 
A small carinated species, flat above, convex below, having much the appearance of a 
valvata, found only in lakes on Whidby's island, at the entrance of Puget Sound. 
