REGULAR MEETING, MAY 15TH, 1865. President in the chair. Eight members present. Mr. John Klippart, of Columbus, Ohio, was elected a corresponding member. Dr. Kellogg called the attention of the Academy to the _Œnotheræ graciliflora_, with a variety of the same. Mr. Bolander made some remarks upon the isolated position of the Red-woods upon the hills back of Oakland. REGULAR MEETING, JUNE 5TH, 1865. President in the chair. Eleven members present. Dr. C. T. Jackson, R. Kennicott, and W. H. Dall, visitors. Donations to the Cabinet: Marine shells from the neighborhood of Hong Kong, by Mr. Stearns. Donations to the Library: Notes on the habits of some species of Humble Bees, and the Humble Bees of New England, by F. W. Putnam and A. S. Packard, Jr., presented by the authors; Proceedings of the Academy of Natural Sciences of Philadelphia, for November and December, 1864. Messrs. Kennicott and Dall made some remarks on the workings of the Essex Institute. Dr. Jackson spoke of the progress and condition of the Boston Society of Natural History. Dr. Jackson also mentioned the discovery by him, in the Mammoth Mining District, near Austin, Nevada, of Tungstate of manganese and Tungstate of lime. REGULAR MEETING, JUNE 19TH, 1865. President in the chair. Nine members present. Donations to the Cabinet: Specimen of coral from the Farallone Islands, by Mr. Hubbard; Specimens of silver and copper ores and cinnibar from Mexico, by the Editor of _La Voz de Mejico_; Skull of the Sea-otter, (dug out of the sand near the Cliff House,) by Mr. Daniel E. Webb; Fibrous bark from China, by Mr. C. A. McNulty. Donations to the Library: Notes on the Genus Gundlachia and of the fossil crab of Gay Head, by Dr. Wm. Stimpson; Proceedings of the Philadelphia Academy of Natural Sciences for January, February and March, 1865; Silliman’s Journal, May, 1865; Annual Report of the Museum of Comparative Zoology of Cambridge; Report of the ninth census Of the U.S. Mr. Hubbard presented the following paper from Mr. W. H. Pease, of Honolulu: On the existence of an Atoll near the west coast of America, and proof of its elevation. BY W. HARPER PEASE, OF HONOLULU, H. I. Having read an interesting paper by Dr. Blake, in a late number of the _Proceedings California Academy_, on the proofs of a recent elevation of the coast of California, it occurred to me that I had in my note book, information unpublished on the same subject. As it lies within the field occupied by your Academy, I furnish it herewith for publication. My information was gathered from a Journal kept by Lieut. Griswold,[11] (a young gentleman of scientific taste, and a close and accurate observer,) during a cruise off the west coast of Mexico, in search of guano. Among the islands visited, was “Clipperton Rock,” which is the locality I refer to. Before giving any extract, I will state what was known of the island.