BY ROBERT E. C. STEARNS.

Dr. Newcomb also visited Santa Cruz Island, and collected the following species:

List of Shells collected at Purissima and Lobitas, California, October, 1866.

BY ROBERT E. C. STEARNS, CURATOR OF CONCHOLOGY, CAL. ACAD. NAT. SCIENCES.

“Purissima” and “Lobitas” are the names of two creeks situated a few miles south of Spanish Town, in San Mateo County. Near the points where these streams empty into the ocean are small beaches and groups of flat rocks left bare at low tide, limited, however, in extent, as the shore in the neighborhood is for the most part exceedingly bold and precipitous, the ocean at ordinary high water beating against the base of the cliffs.

Dr. Newcomb and myself visited the localities at the period above mentioned, and collected the following species from among the drift or upon the rocks: