ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 601 



8oC. Sj/p« sicnrim, Old. On** dead shell, neai Steilacoom, Pufret Sound. Cooper. 

 " I'robablv abniulant on the nmd-tiats near the mouth of the Nisiquaily 

 River," J. (i. V. 



J, Mnrfirera ptitidit, Portl. and Dix. (Coop, errata; Nuttnlli in text), —Solcn 

 hilt limns. Wood, non Chi-mn. , = Soleciirttts Nuttallii, Conr.,^ Mach(rm rus- 

 tata, Midd., noii Say. \Va-*liiiiirton Ter., Cooper. "Burrows a few inches 

 from the surtace, at the edire of the usual low tide : is justly considered 

 (except thf oyster) the best of the many fine eatable molluscs of the cou.-t. 

 It i-i till' only truly marine mollusc found near the Columbia Kiver ; extends 

 northwards wlierever the beach is sandy, but not known in the Straits of 

 de Fuca." ./. G. C. 



„ Mijn riincellata, {Plati/odon), Conr. Dead valves, St. Luis Obispo, Dr. 

 Antisell. 



„ Sphftiiia ('(ilifornirn, (Cryptomya), Conr. San Francisco, Trask. 

 3S0. Mi/ti'inwriii Xntfnlli, Conr. A jrroup, nestliiifr in a white, friable, arenaceous 

 substance, was obtained at San Diego by Lieut. Troichridf/e. 



ff Phuliis ' Pliiihiilidin] pi-tiitn, Conr., = P. concamcrata, Desh. From worn rock 

 which di'ifted into Siioalwater Bay, attached to the roots of Macrocystiti, 

 the iriant seaweed, Cooper; De Fuca, Suckley; mouth of Umpqun Kiver, 

 Oregon, Dr. Vollitin. 



The above list must he considered as a resume, not merely of the shells of the 

 N. P. Railroad Survey, hut also of all those examined by Judge Cooper, from 

 the Siiiifhsoiiian Museum and from his own private cullectiin. It is jjccu- 

 liurly valuable as preserving the notes concerning station, &c.. of the originjjl 

 explorers, and has therefore recpiired a more lengthened analysis. 



The land-shells collected by Dr. Xewberry in the Pacific Eailroad Survey were 

 described by W. G. lliniiey. Escj., with his accustomed accnracy. His pajKT 

 will be found in the Kcports, vol. vi. pp. 111-114. The fuUowiiig are the 

 only species enumerated : — 



1. Helix Jicli lis. Gray, Chem., Pfr., Pve., = ^. Kuttallittna, Lea, Binney, sen.. Da 



Kav. Portland, Oregon, iNWixTry. Local. 



2. Helix infvmata. Old.. Proc. Bost. X. II. S., Feb. 1855, p. 127. Hills near 



San Francisco, Nen-berrtf. Extremely rare. 

 S. Helix aruginosa, (MA., var. /3. loc. cit. North of San Francisco, Netcberry. 



Pare. 

 4. Helix Diipetithnvfirsi, jun., Desh., Chem., Pfr., Rve.,= 7/. Oregotiensis, Lea, 



Pfr. San Francisco, J5enicia, Cal. ; Klamath Lake, Oregon; Neuberi-y. " One 



of the commonest and most wideh' distributed species of the Pacific region." 



102. The U. S. Government also sent out a " North-west Boundary Com- 

 mission," in charge of Archibald Campbell, Esq. The natural-history 

 arrangements were superintended by tlie Smithsonian Inst., and Dr. C. B. R. 

 Kennerly was appointed naturalist to the Expedition. At his request, I 

 undertook to prepare a Report of the MoUusca, 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. Kennerly died on his return from a three years' exploration ; and the 

 civil w.'r 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 u 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 successsive naturalists. The pre- 



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