290 PROCEEDINGS OF THE CALIFORNIA 



the locality, and another was presented to me by Mr. Richard Carroll, it having 

 been saved by the quarry men, under the impression that it was a petrified 

 rattlesnake. It is about six inches in its longest diameter, being elliptical and 

 evidently distorted by lateral pressure. 



II. TOOTH OF THE EXTINCT ELEPHANT, PLACER COUNTY. 



I have received from Mr. Raker and Mr. Thompson, through the hands of 

 Mr. E. Tyler, all of Placer County, a single molar tooth of Elcphas found in 

 the auriferous gravel near Michigan Blnfis, thus adding another locality to the 

 list showing the former general distribution of the ancient elephants over this 

 coast. 



III. SHARK TEETH AND OTHER MARINE REMAINS, TULARE COUNTY. 



When at Ocoya or Posa Creek, in 1853, I collected a great number of shark 

 teeth from the tops of the hills, at the base of the Sierra Nevada, on the east 

 side of the Tulare Lake. These were described and figured in my Report to 

 the U. S. Government. Having recently revisited that region, I found other 

 localities, and made another collection, a part of which I now exhibit to the 

 Academy. The following genera and species are represented : Oxyrhina plana, 

 0. tumula, Lamna clavata, Galeocerdo productus, Priojwdon antiquus, Herni- 

 pristis heteroplcurm, Notidanus, (Nov. Sp. ?) and Zygobates, a genus of the 

 family of Skates, having pavement-like teeth. Vertebrataa, apparently of the 

 whale, are abundant, and some fragments of the head. These remains are now 

 at least twelve hundred feet above the sea, and being in unbroken horizontal 

 strata, show a very great and general uplift of the region in comparative late 

 times. The strata were referred to the Miocene in my Report, but I am now 

 inclined to regard them as Post-Pliocene. It is interesting to note that these 

 strata rest undisturbed upon granite, which is traversed by gold-bearing veins, 

 not over five miles from the point where the fossils are found, and so low that 

 the veins must have been covered by the sea prior to the elevation of the region. 



IV. QUARRY OF GOLD-BEARING ROCK. 



The Raker or Whiskey Hill Mine of Placer County, a few miles from Lincoln, 

 presents the novelty of profitable gold mining from a quarry in the slates 

 without any well defined quartz vein. A hill with a rounded outline is covered 

 with rough outcrops of rusty slate, over a breadth of two hundred feet or more. 

 A quarry at one end exposes the slate, with a great variety of colors, from white 

 to brown and red and black, the whole of it being soft and ochraceous, and in 

 places stained green and blue with carbonate of copper. These variegated 

 slates are like those commonly known, among California copper prospectors, as 

 •' calico rocks," and the ground was first located and prospected for copper. 



