Communication on the San Luis Obispo Quicksilver Fossils.
BY WM. M. GABB.
Mr. Attwood has recently presented to the collection of the State Geological Survey, a series of Fossils collected by himself, in the formation in which the San Luis Obispo cinnabar deposits occur.
Through the kindness of Prof. B. Silliman, Jr. I have had the opportunity of examining another small collection, made by that gentleman, at the same locality. I consider the result of sufficient interest to warrant a special communication on the subject.
The Fossils, though few in number of species, point unequivocally to the Miocene formation, the species being among the most familiar forms in the middle deposit of that formation in California.
They were: Dosinia ponderosa, Saxidomus aratus, Conus ravus = C. Californicus Reeve, Turritella Ocoyana Con., Natica, probably N. Recluziana, Pecten Pabloensis Con., Pallium Estrellanum Con., Carcharodon rectus Agas. a Balanus and one or two small shells too imperfect for determination.
Mr. Moore presented on behalf of Prof. Dana, the following paper: