OV MOLLUSCA OP THE WEST COAST OP NORTH AMERICA. 579 



d. The Pacific Railroad Survey, under Lieutenant R. S. Williamson, 1853. 



Collector, Dr. A. L. Heermann. 

 «. The Pacific Railroad Survey, under Lieutenant R. S. Williamson, 1855, 



Collector, Dr. J. S. Newberry. 



f. Unitt'd States and Mexican Boundary Survey, under Major W. H. Emory, 



lSo2. Collector, Arthur Schott. 



g. Colorado Expeditioa, under Lieutenant J. C. Ives. Collector, Dr. J. S. 



Newberry. 

 h. The United States North-West Boundary Survey, under Com. A. Camp- 

 boll. Collectors, Dr. Kcnnerley and Mr. (Jeorge Gibl)S. 

 Besides the above official explorations on the American side, dnrinp a 

 period in which the British Government only fitted out a sinj^le expedition 

 coordinate with h, the Smiths. Inst, has received a large number of pri- 

 vate collections from their correspondents, of which the following are the 

 principal : — 

 I. Mr. Jas. G. Swan, from Port Townsend, Cape Flattery, Neeah Bay, and the 



neighbouring shores of Vancouver ; at intervals, during many years. 

 j. Dr. J. G. Cooper, early private collections from Shoalwuter B;iy and various 



stations in California and from Panama; and lately the dredged collections 



of the California State Geological Survey, of which a portion were sent 



in advance by Dr. Palmer, 

 i-. California Academy of Natural Sciences, duplicates of their collection, 



with the privilege of inspecting unique specimens. 

 J. Dr. E. Vollum, U.S.A., from Fort Umpqua. 



m. Lieutenant W. P. Trowbridge, from coast of Oregon and California, 

 n. Dr. J. A. Veatch, from the peninsula of Lower California, and especially" 



from Cerros Island. 

 0. Mr. A. S. Taylor, from Monterey. 

 IK Mr. Andrew Cassidy, from S. Diego. 

 <{. Rev. J. Rowell, now of San Francisco, from ^ irious stations in both faunas, 



and especially from Sta. Crux, and the Fai illones Is. 

 r. Mr. John Xantus, of the U. S. Coast Survey, from Cape St. Lucas. Sptci- 



mens were received through him from Socorro Island (one of the Revilla- 



gigedo group), Tres Marias and Margarita Island, 

 s. Cai)tain C. P. Stone, from Guaymas and the northern part of the Gulf of 



Califorria. 

 t. Captain C. M. Dow, from the coast of Central America. 

 ?( Dr. J. H. Sternberg, from Panama. 



V. Dr. J. H. I'rick, Mr. James Hepburn, and others, from San Francisco. 

 VI Mr. C. N. Piotte, U. S. Minister to Costa Rica, from Puntas Arenas. 

 A'. Mr. W. H. Pease, of Honolulu, collections made by his agents at various 



stations on the coast, particularly at Margarita Baj'. 

 Collections ha'-e also been received from various expeditions already tabu- 

 luted in the first Report ; and from stray quarters not here included because 

 their accuracy mxy admit of doubt. The species received from the most im- 

 jiortant of these sources will be enumerated in their order ; of the remainder, 

 exact lists may be consulted by the student in the Smithsonian Catalogues, 

 and the combined results will be found tabulated as ' Pacific Railroad Expe- 

 ditions ' or ' Smithsonian Collections.' 



[BJ Smithsonian Puhlications. — These may be classed under three heads. 

 (1.) Works published by the U. S. Government, with more or less of assist- 

 ance derived from and through the Smiths. Inst. (2.) The ' Smithsonian 

 Contril)utions to Knowledge,' printed in 4to, and answering to the ' Trans- 

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