Regular Meeting, November 19th, 1866.
President in the Chair.
Thirteen members present.
Mr. J. B. Russell and Dr. E. Belle were elected Resident Members.
Donation to the Cabinet: Specimens of Copper ore from Chihuahua, by Mr. R. C. Jacobs.
Donation to the Library: On the Corals and Polyps of Panama, with descriptions of new species, by A. E. Verrill, 8vo. pamphlet.
Prof. Whitney presented the following communication from Wm. M. Gabb: