Prof. Blake mentioned that a tooth of a mastodon had been found about three miles from Antioch, near Monte Diablo, by Capt. Stevens.
Mr. Stearns gave an account of the Helix, its anatomy, geographical distribution, and use as an article of food and for medicinal purposes, in both ancient and modern times.
Prof. Blake stated that he had in his possession a portion of a human skull said to have been taken from a depth of 250 feet below the surface, near Columbia, in Tuolumne County.
Regular Meeting, September 3d, 1866.
President in the chair.
Twelve members present, and Mr. A. Wood as a visitor.
Mr. John Swett was elected a Resident Member.
Donations to the Cabinet: Two specimens of fishes from Dr. Kellogg and Dr. Behr; specimen of a fungus, Polyporus igniarius, from Dr. Kellogg.