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:
On the Crystallization of Brushite.
BY JAMES D. DANA, L.L.D., PROFESSOR OF MINERALOGY IN YALE COLLEGE.
The specimens of the mineral Brushite, which I have had under crystallographic examination, were received from Mr. G. E. Moore, the discoverer of the species.
The crystals are slender prisms, not over a third of an inch in length. A common form (containing all the observed planes), is shown in the annexed figure. The prisms are monoclinic, and are often flattened, parallel to the clinodiagonal, as here represented.
Fig. 26.