Mr. Brewer stated that he had obtained further information regarding the coal brought before the Academy Feb. 15th, by Prof. Blake. On the authority of J. Ross Browne and another gentleman, he had learned that no coal occurs in the locality near the Colorado River then mentioned, and that the specimens were English coal carried up the river by speculators for the purpose of swindling the public by selling stock in a fictitious coal mine. REGULAR MEETING, JUNE 6TH, 1864. President in the Chair. Nine members present. Donations to the Cabinet: A piece of sandstone resembling in shape a human foot, by Mr. Ed. Webber. Donations to the Library: American Journal of Science and Arts for March, 1864, from the editors. Observations on the Genus Unio, by Isaac Lea, L.L.D., Vol. 10. How to collect and observe Insects, by H. S. Packard, Jr. Plants of Buffalo, N. Y. and its vicinity, by G. W. Clinton. Bulletin of the Museum of Zoölogy of Cambridge, Mass. pp. 29—60. Report of contributions to the Pennsylvania Relief Association for East Tennessee. Proc. of the Acad. Natural Sciences of Philadelphia from October to December, 1863, and January and February, 1864. Contributions to the Physics, etc. of the Sacramento River, by Thos. W. Logan, M.D., extracted from the Pacific Medical and Surgical Journal, Vol. 7, 1864,—from the author. REGULAR MEETING, JUNE 20TH, 1864. President in the Chair. Eleven members present. C. W. M. Smith and Dr. McClure, of Redwood City, were elected resident members. Donations to the Cabinet: A large crab, from the west coast of Mexico, by G. O. Haller, through Dr. Cooper. Donations to the Library: Report of the Smithsonian Institution for 1862. ADJOURNED MEETING, JULY 11TH, 1864. Dr. Trask in the Chair. Seven members present. The following paper was received from the author, in accordance with the proposition accepted by the Academy Dec. 7th, 1863. Descriptions of New Marine Shells from the Coast of California. PART I. BY PHILIP P. CARPENTER, B.A., PH.D. _Corresponding Member of the Académies of Philadelphia and California, etc._ WARRINGTON, ENGLAND, May 4th, 1864. The shells to be described in these papers were collected by Dr. J. G. Cooper, for the State Geological Survey of California. Being aware that I was engaged in preparing descriptions of the shells of the Smithsonian collections, to serve as a handbook on the Mollusca of the western coast, and also (at the present time), a “Supplementary Report on the present state of our knowledge of the Mollusca of the west coast of North America,” for the British Association; he has very obligingly transmitted to me such duplicates as could be spared from the State collection for identification. CALLIOSTOMA SWAINSON, 1840. _Calliostoma formosum_ Carp. n. sp. State Collection, Species 615 a.