This is a very interesting shell, being one of the links between the land and marine mollusca—the species of the genus being chiefly tropical, occurring at Cape St. Lucas, Panama, West Indies, Africa, and Isle of France, according to Binney, who says that they inhabit crevices of rocks, especially those exposed to the full force of the tide; but being pulmonate, they can probably live long with but little moisture. On the rocks the living shell would be mistaken for a Lacuna or Littorina, and the form of our species reminds one strongly of Succinea Oregonensis.
A communication was received from Dr. Canfield of Monterey, giving an account of the discovery in Monterey Bay, of a fish, pronounced by the naturalists of the Smithsonian Institution to be a new species of Bdellostoma, a genus not previously known to exist nearer than the coast of Chili.
Mr. Falkenau made some remarks on the use and value of the spectroscope in chemical analysis and in other scientific investigations.
Regular Meeting, October 1st, 1866.
President in the chair.
Fourteen members present.
Messrs. A. Winslow Boynton, and T. C. Leonard were elected Resident Members.
The resignation of Royal Fisk, Resident Member, was received and accepted.