File:Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean (1855) (14757949954).jpg

Identifier: reportsofexplora05unit_0 (find matches)
Title: Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean
Year: 1855 (1850s)
Authors: United States. War Dept Henry, Joseph, 1797-1878 Baird, Spencer Fullerton, 1823-1887 United States. Army. Corps of Engineers
Subjects: Pacific railroads Discoveries in geography Natural history Indians of North America
Publisher: Washington : A.O.P. Nicholson, printer (etc.)
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

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ior more pearly, and the margin more uniformly deep black. Locality.—San Francisco. (2.) ostrea.—A small parasitic Oyster, on twigs, probably of Gorgonia, usually projectingequally to either side. The form is elliptical, the under valve having a groove tor the twig,with a corresponding eminence in the upper valve ; sometimes it adheres by but one edge, andthen assumes an oblique, alate form, like Avicula. It is quite thin, lincated, radiately orna-mented with fasicles of brown lines. Locality.—San Diego. 336 APPENDIX Another oyster from San Diego, about two inches long, narrow and moderately widening,slightly sigmoid inform, its margins simple and the extremity somewhat truncate and undulateor dentate, with four or five radiating grooves ; shell compact, upper valve purplish. It occursjn clusters intimately grouped, much like the parasitic oysters of Carolina, but more elongate,less digitate at the end, less cavernous under the beak, and less black within. Locality.—San Diego.
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ARTICLE IV. LETTER FROM PROFESSOR J. W. BAILEY, DESCRIBING THE STRUCTURE OFTHE FOSSIL PLANT FROM POSUNCULA RIVER. West Point, New York, March 22, 1855. Dear Sir : I send herewith a sketch of the structure of the fossil plant from the houlder inthe bed of Kern River, west slope of the Sierra Nevada. The plants, as far as I can make out the structure, are annual shoots of an exogenous struc-ture, presenting a distinct pith, (p. in the drawings, Plate XII, figs. 1 and 2); medullary rays(r); a layer of liber (1); and a loose succulent bark (b), having large lacunee (la). In the outerportion of the wood a series of large vessels, v 1; of smaller, v 2 ; and of still smaller ones, v 3,are placed. I could not detect upon these vessels any indications of spiral or dot. The specimens from the east slope of the Sierra agree in all essential points with the above,the only difference noticed being the development of a few large vessels surrounded with woodyfibre within the pithy portion. I cannot

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