Regular Meeting, December 17th, 1866.
President in the chair.
Twelve members present.
Dr. F. Hansen was elected a Resident Member.
Donation to the Cabinet: Skeleton of a Beaver, presented by Mr. S. Hubbard.
Donation to the Library: Ninety-six volumes and pamphlets chiefly on various branches of natural history, from the library of the late William Cooper, of New York, presented by J. G. Cooper, M.D.