Regular Meeting, March 4th, 1867.

President in the Chair.

Twenty-nine members present.

Messrs. J. M. Sibley, William Norris, Henry Pickel, John W. Nystrom, Ross E. Brown, Cornelius B. Miller and Theodore P. Painter were elected Resident Members.

Donations to the Cabinet: “Electro-Silicon,” (Infusorial Silica) from Six-Mile Cañon, near Virginia City, Nevada, from Dr. Lanszweert; Fossil Fruit, from Long Valley, Mendocino County, from C. Beottie; Fossil Shells, from the line of the Erie (Steuben County, N. Y.) Railroad, by A. T. Beardsley; Magnesium Wire, by C. Z. Wilson; Fragment from the “Pyramid of Cheops,” by Mr. Elliott; Two Specimens of Petrified Wood, from Sonoma County, Package of Coffee Seed and Specimen of Nest of Trap-Door Spider, from Dr. Kellogg.

Prof. Whitney announced the death of Alexander Dallas Bache, and read a notice of his life and eminent scientific services.

Mr. Stearns read the following communication, prefacing it with some remarks on the hibernation and æstivation of land shells: