306. 
377. 
381. 
”» 
ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 599 
Helix Columbiana, Lea,=labiosa, Gld. “In wet meadows from Vancouver 
to the coast, not near Puget Sound,” W. T., J. G. Cuoper. 
Helix Vancouverensis, Lea | +sportella, Gld., teste Bland]. “ West of Cas- 
cade Mountain; most abundant under alder-grovyes; also on Whidby’s 
Island,’ W. T., J. G. Cooper. 
Helix devia, Gld.,= Baskervillei, Pir. Two sp. in damp woods, near Van- 
couver, W.T., J. G. Cooper. 
Helix tudiculata, Binn. Rare, with the last, Vancouver; also Washington 
Territory, J. G. Cooper. 
Succinea Nuttalliana, Lea. Rare and dead, at Vancouver, J. G, Cooper. 
Limax 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. 
. Limnea umbrosa, Gld. Lake Oyosa, Okanagan River, J. G, Cooper. 
Limnea emarginata, Say. Lake Oyosa, Okanagan River, J. G. Cooper. 
Limnea jugularis, Say. Lake Oyosa, Okanagan River, J. G. Cooper. 
Physa elongata, Say. Near Puget Sound, J. G. Cooper. 
Physa heterostropha, Say. Ponds in W.T., J. G. Cooper. 
Physa bullata, Gld. MS. Lake Oyosa, W.T., J. G. Cooper. 
Ancylus caurinus, Coop., ?n.s, [“P=A. Nuttalli, Hald.,” 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- 
couyer, W.T., J. G. Cooper, 
Planorbis plarulatus, Coop.,n.s. A small carinated species, found only in 
lakes on Whidby’s Island,” J. G. Cooper. [Comp. P. opercularis, Gld. | 
Bulla nebulosa, Gld. Bay of 8. Pedro, Trask. 
Bulla tenella, A. Ad., in Sby. Thes. pl. 134, f. 104 [?]. Puget Sound, one sp., 
Suckley. [?= Haminea hydatis. | 
Ostrea edulis, Coop. [non Linn.:=O. lurida, Opr.]. 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.” 
beeen anomig macroschisma, Desh. De Fuca, Gibbs; Nootka Sound, Capt. 
Russell. 
Pecten caurinus, Gld. De Fuca, Suckley. One of the specimens measures 
23 inches in circumference and 8 in. across. 
Peeten ventricosus, Sby.,+-tumidus, Shy. [= Pvar. equisulcatus, Cpr.]. Upper 
Cal., Trask; San Diego, Cassidy. 
Mytilus edulis, 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. 
Mytilus Californianus, Conr, Puget Sound, Port Townsend, Suckley, Gibbs ; 
Upper Cal., Trask. One specimen is 9} inches long. 
Modiola capax {| Cooper, non] Cony. [ = M. modiolus, Ln.]. Not common. Str. 
de Fuca, Gibbs, Cooper. 
Modiola flabellata, Gld. Puget S. and Str, de Fuca, Gibbs. [= M. recta, var.] 
Lithophagus, sp. ind., like ites [Probably Adula stylina, Cpr.] Rocks 
near mouth of Umpqua River, Oregon, Dr. Vollum. 
Area grandis, Coop. [non Brod. and Sby.,= A. multicostata, Sby.]. One sp. 
living. San Diego, Cassidy. 
Margaritana margaritifera, Lea,= 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 
i found in the Chehalis, the streams running into Puget Sound, and most 
ranches of the Columbia. No species is found in the streams running into 
<a el Bay. Eaten by the Indians E. of the Cascade Mountains,” 
