Donations to the Library: Fragmenta Phytographiæ Australis, Vols. 1, 2, 3, and part of Vol. 4. Transactions of the Philosophical Society of Victoria, Vols 1 to 5. The plants indigenous to the Colony of Victoria, Vol. 1. All donated by Dr. Ferdinand Mueller, Director of the Botanical Garden at Melbourne. Mr. Clayton made the following remarks in regard to his donations above mentioned: The teeth were found near Walkers River, about one mile below the residence of Mr. G. E. Wellington, on the Carson River and Aurora Road. This river cuts through a high range of hills immediately west of Wellington’s, and enters a large basin or valley, which is some thirty miles long, from north to south, by twenty miles wide, from west to east. After passing through this valley to the eastward, the river enters another cañon of considerable extent, and then empties into Walkers Lake, in the southwest portion of the great basin. The banks of the river are formed of gravel, sand, and clay cement, containing soda and calcareous matter, which forms a white crust on the surface of the stones and pebbles. The cement bluffs along the river, are from 6 or 8 to 20 feet high, and are cut out by changes in the channel during high water. In one of these recent cuttings, the large tooth was found, with part of the upper jaw and other portions of the skeleton. There has been no excavation made, as yet, to uncover other portions of the skeleton, but Mr. Wellington has promised to have it done, and to secure as much of the skeleton as possible, for the Society’s collections. The small teeth were found about five feet below the surface in the solid cement, by some parties that were digging a grave. Quite a number of teeth were found, but with the exception of the two just presented to the Society, they were not preserved. REGULAR MEETING, NOV. 21ST, 1864. President in the Chair. Seven members present. Rev. Horatio Stebbins was duly elected a resident member, Mr. Edward Bosqui a life member, and Mr. G. E. Wellington, of Nevada, a corresponding member, of the Academy. Donations to the Cabinet: Specimens of Corals from the Hiton group of Islands, also a photograph of a Fungus [Agaricus], from the Society Islands, by Mr. Hubbard, on behalf of Mr. Andrew Garrett. Two specimens of Inoceramus, from Seattle, Puget Sound, by Mr. Hubbard. Mr. Gabb presented the following papers: Notes on some Fossils from the Gold Bearing Slates of Mariposa, with description of some new species. BY WM. M. GABB.