PROCEEDINGS OF THE CALIFORNIA ACADEMY OF NATURAL SCIENCES. VOLUME III. 1863-1867. SAN FRANCISCO: PUBLISHED BY THE ACADEMY. 1868. The date of publication of each sheet will be found at the bottom of pages. The sheets of this volume have been circulated separately, and also in annual parts, as follows: Part I, p. 1-96, for 1863, printed in April to December, 1863. ” II, p. 97-176, for 1864, ” January to December, 1864. ” III, p. 177-272, for 1865-6, ” January, 1865, to August, 1866. ” IV, p. 273-360, for 1866-7, ” January to September, 1867. ” V, p. 361-401, for 1867, ” May, 1868. A few copies of Vol. II, pp. 236, remain for sale by the Corresponding Secretary. Volume I is out of print, but the Academy intends to reprint it when a sufficient number of copies have been ordered to refund the cost. _The following Memoirs were also published by the Academy, in quarto, in 1867._ No. I. Catalogue of Pacific Coast Mosses, pp. 38, By LEO LESQUEREUX. No. II. Natural System of Volcanic Rocks, pp. 95, By F. BARON RICHTHOFEN, Dr. Phil. ROOMS OF THE ACADEMY, 622 CLAY STREET, _San Francisco, June, 1868_. The Academy, desirous of increasing its numbers, and thus adding to its means of scientific research and diffusion of knowledge, has this year altered its title to that of “CALIFORNIA ACADEMY OF SCIENCES,” and invites all interested in the increase and spread of any branch of knowledge to join in its work. All gentlemen residing within one hundred and fifty miles of San Francisco are, by the new Constitution, eligible to resident membership, with all the privileges of those in the city, including free copies of the proceedings published after their election. A copy of the new Constitution, Annual Address of the late President, Prof. J. D. Whitney, and list of members at the commencement of 1868, may be obtained free by addressing the Corresponding Secretary. Meetings are now held on the first and third Mondays of each month, at the rooms of the Academy, where lectures are given, papers read and discussions held on scientific subjects. All desiring to become members may be introduced at the meetings on application to the officers and members. Rooms open daily, from 12 to 1 o’clock, and the Librarian or other members are usually present. OFFICERS: