ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 5D9 



Page. 



376. Hdix Columbiana, Lea,=fo&zosa, Gld. "In wet meadows from Vancouver 

 to the coast, not near Puget Sound," W. T v J. G. Cooper. 



877. Helix Fancouverensis, Lea \_+sportetta, Gld., teste Bland]. "West of Cas- 



cade Mountain ; most abundant under alder- gro ves j also on Whidby's 

 Island," W. T., J. G. Cooper. 



IMiv devia, Gld.,=Basikervillei, Pfr. Two sp. in damp woods, near Van- 

 couver, W. T., J. G. Cooper. 



,, Hdix tudiculata, Binn. Rare, with the last, Vancouver ; also Washington 

 Territory, J. G. Cooper. 



Succinea NuttaUiana, Lea. Rare and dead, at Vancouver, J. G. Cooper. 



Umax Columbianus, Gld. "Abundant in dense, damp spruce-forests, near 

 Pacific coast; grows to 6 inches, and is smooth, not rugose, when living," 

 J. G. Cooper. 



878. Limncga umbrosa, Gld. Lake Oyosa, Okanagan River, J. G. Cooper. 



Limnaea emarginata, Say. Lake Oyosa, Okanagan River, J. G. Cooper. 



Limmcajuguiaris, Say. Lake Oyosa, Okanagan River, J. G. Cooper. 



Physa elongata, Say. Near Puget Sound, J. G. Cooper. 



Physa heterostropka, Say. Ponds in W. T., J. G. Cooper. 



Physa bullata, Gld. MS. Lake Oyosa, W. T., J. G. Cooper. 



Ancylus caurinm, Coop., ?n.s. ["? = A. Nuttalli, Hold.," Coop. MS.] Black 

 River, near Puget Sound, J. G. Cooper. 



Planorbis corpulentus, Say. Lake Oyosa, W. T., J. G. Cooper. 



Planorbis trivolvis, Say. Exceedingly abundant in shallow lakes near Van- 

 couver, W. T., J. G. Cooper. 



Planorbis planulatus, Coop., n. s. "A small carinated species, found only in 



lakes on Whidby's Island," /. G. Cooper. [Comp. P. opcrcularis, Gld.] 

 379. Sulla nebulosa, Gld. Bav of S. Pedro, Trask. 



Sulla tenella, A. Ad., in Sby. Thes. pi. 134. f. 104 [?]. Puget Sound, one sp., 

 Snckley. [?=Haminea hydatisJ] 



ff Ostrea edulis, Coop, [non Linn. :=O. lurida, Cpr.]. De Fuca and Puget 

 Sound, Gibbs -, Shoalwater Bay, Cooper. "Small in Puget Sound; finer in 

 Shoalwater Bay, which supplies S. Francisco market ; large at Vancouver's 

 Island ; very large near mouth of Hood's Canal." 



\Placuri\anomia macroschisma, Desh. De Fuca, Gibbs', Nootka Sound, Copt. 

 Russell. 



Pe?ten caurinus, Gld. De Fuca, Suckley. One of the specimens measures 



2 } inches in circumference and 8 in. across. 



830. Pecten rentricosus, $b\.,~\-tumidus, Sby. [= ?var. aquisulcatus, Cpr.]. Upper 

 Cal., Trask\ San Diego, Cassidy. 



, Mytffus edulu, Ln. Shoalwater Bay, Cooper. " As abundant as in Europe 

 and N. England, with the same variations, and when eaten occasionally 

 causing urticaria." J. G. Cooper. 



, Mytilm Cahforniamts, Conr. Puget Sound, Port Townsend, Stickley, Gibbs j 

 Upper Cal, Trask. One specimen is 9 inches long. 



n Modiola capax [Cooper, non] Conr. [ = Jf. modiolus, Ln.]. Not common. Str. 

 de Fuca, Gibbs, Cooper. 



ModiolafiaMlata^ Gld. Puget S. and Str. de Fuca, Gibbs. [ = 3f. recta, var.] 



Lifhophaaus, sp. ind., like falcatus. [Probably Adula stylina, Cpr.] Rocks 



near mouth of Umpqua B-iver, Oregon, Dr. Vollum. 



331. Area grandis, Coop, [non Brod. and Sby.,= A. multicostata, Sby.]. One sp. 

 living. San Diego, Cassidy. 



n Marffaritana margariti/era, ~Le&, = Alasmodonta falcata, Gld. River Chehalis, 

 &c., W. T., Cooper; Shasta River, Or., Trask. After careful comparison 

 with eastern U. S. specimens, and those from Newfoundland and Europe, 

 Judge Cooper agrees with Dr. Lea that the N.W. shells are at most a slight 

 variety. " The most abundant of the freshwater bivalves, and the only one 

 yet found in the Chehalis, the streams running into Puget Sound, and "most 

 branches of the Columbia. No species is found in the streams running into 

 Shoalwater Bay. Eaten by the Indians E. of the Cascade Mountains/' 

 J. G. C, 



85 



