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ZOOLOGY. 
surface is smooth, not rugose, when alive, as represented in Dr. Binney’s plate, and its color 
is a pale yellowish olive, usually more or less irregularly blotched with black.—C. 
Family LYMNiEADiE. 
LYMNiEA UMBROSA. 
Lymncea umbrosa, Gould. 
Ilab. —Lake Oyosa, on the Okanagan river, near lat. 49°; Dr. Cooper. 
LYMJSLEA EMARGINATA. 
Lymncea emarginata, Sat. 
Hab. —Lake Oyosa, Washington Territory; Dr. Cooper. 
LYMNiEA JUGULARIS. 
Lymncea jugularis, Say. 
Hab. —Lake Oyosa, Washington Territory; Dr. Cooper. 
PHYSA ELONGATA. 
Physa elongata, Sat. 
Hab. —Near Puget Sound ; Dr. Cooper. 
PHYSA HETEROSTROPHA. 
Physa heterostropha, Sat. 
Hab. —Ponds in Washington Territory ; Dr. Cooper. 
PHYSA BULLATA. 
Physa bullata, Gould, ms. 
Hab. —Lake Oyosa, Washington Territory; Dr. Cooper. 
ANCYLUS CAURINUS, n. s. ? 
Hab. —Black river, near Puget Sound; Dr. Cooper. 
PLANORBIS CORPULENTUS. 
Planorbis corpulentus, Sat. 
Hab. —Lake Oyosa, Okanagan river; Dr. Cooper. 
PLANORBIS TRIVOLVIS. 
Planorbis trivolvis, Say. 
Hab. —Near Vancouver; Dr. Cooper. 
“Exceedingly abundant in shallow lakes about Vancouver, the dead shells lining the 
shores.”—C. 
PLANORRIS 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. 
