ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 601 
3a, Solen sicarius,Gld. One dead shell, near Steilacoom, Puget Sound, Cooper. 
“Probably abundant on the mud-flats near the mouth of the Nisqually 
River,” J. G.. C. 
»  Machera patula, Portl. and Dix. (Coop. errata; Nidttalli in text), = Solen 
maximus, Wood, non Chemn.,= Solecurtus Nuttallii, Conr.,= Machera cos= 
tata, Midd., non Say. Washington Ter., Cooper. “ Burrows a few inches 
from the surface, at the edge of the usual low tide; is justly considered 
(expept the oyster) the best of the many fine eatable molluscs of the coast. 
tis the only truly marine mollusc found near the Columbia River; extends 
northwards wherever the beach is sandy, but not known in the Straits of 
de Fuca,” J. G. C. ; 
. st bn geri (Platyodon), Conr. Dead valves, St. Luis Obispo, Dr. 
ntesetl. 
»  Sphenia Californica, (Cryptomya), Cony. San Francisco, Trask. 
336. Mytilimeria Nuttall, Conr. A group, nestling in a white, friable, arenaceous 
substance, was obtained at San Diego by Lreut. Trowbridge. 
» Lholas { Pholadidea] penita, Conr., = P. concamerata, Desh. From worn rock 
which drifted into Shoalwater Bay, attached to the roots of Macrocystis, 
the giant seaweed, Cooper; De Fuca, Suckley; mouth of Umpqua River, 
Oregon, Dr. Vollum. 
The above list must be considered as a résumé, not merely of the shells of the 
N. P. Railroad Survey, but also of all those examined by Judge Cooper, from 
the Smithsonian Museum and from his own private collection. It is pecu- 
liarly valuable as preserving the notes concerning station, &c., of the original 
explorers, and has therefore required a more lengthened analysis. 
The land-shells collected by Dr. Newberry in the Pacific Railroad Survey were 
described by W. G. Binney, Esq.,. with his accustomed accuracy. His paper 
will be found in the Reports, vol. vi. pp. 111-114. The following are the 
only species enumerated :— 
1. Helix fidelis, Gray, Chem., Pfr., Rve.,= H. Nudttalliana, Lea, Binney, sen., De 
Kay. Portland, Oregon, Newberry. Local. 
2. Helix infumata, Gld., Proc. Bost. N. H. 8., Feb, 1855, p. 127. Hills near 
San Francisco, Newberry. Extremely rare. 
3. oie eruginosa, Gld., var. B. loc. cit. North of San Francisco, Newberry. 
are. 
4. Helix Dupetithouarsi, jun., Desh., Chem., Pfr., Rve.,=H. Oregonensis, Lea, 
Pfr. San Francisco, Benicia, Cal.; Klamath Lake, Oregon; Newberry. “One 
of the commonest and most widely distributed species of the Pacific region.” 
102. The U. 8. Government also sent out a “ North-west Boundary Com- 
mission,’ in charge of Archibald Campbell, Esq. The natural-history 
arrangements were superintended by the Smithsonian Inst., and Dr. C. B. R. 
Kennerley was appointed naturalist to the Expedition. At his request, I 
undertook to prepare a Report of the Mollusca, to be published and illustrated 
in a form corresponding to the Pacific Railroad Reports ; Dr. Alcock kindly 
undertaking to dissect the animals, and Mr. Busk to examine the Polyzoa. 
Dr. Kennerley died on his return from a three years’ exploration ; and the 
civil war has thus far delayed any further publication. The materials have, 
however, been thoroughly investigated. They consist principally of dredg- 
ings in Puget Sound. On reference to the maps published by the U. S. 
Coast Survey, it will be seen that this inland sea consists of a remarkable 
labyrinth of waters, fiord within fiord, and only indirectly connected with 
the currents of the Pacific Ocean. It might therefore be expected to furnish 
us with the species of quiet migration, and perhaps with those still living 
from a period of previous altered conditions. No doubt it will furnish new 
materials to reward the labours of many successive naturalists, The pre- 
