Geology and Mineralogy. 233 
it ripple-marks and seven footprints, has been obtained at this 
locality by Mr. W. Lorenz. The tracks, according to Dr. Leidy, 
have a breadth of about an inch, widely divergent toes, and the 
four on the right occupy a line of six inches and are about an inch 
7. The Auriferous Gravels of the Sierra Nevada and Califor- 
nia; by J. D. Wurrney (continued from page 147.)-—The follow- 
ing are the more important facts with regard to the fossils of the 
auriferous gravels, The plants were submitted to Professor Les- 
quereux ; and he has reported the absence of Coniferous remains, 
that the species of deciduous trees, seventeen of which are fr 
the Table Mountain deposit, are different from those now existing 
the Extinct Vertebrate Fauna of the Weste erritories, 1873 
€ species reported from the gravels underneath basalt, come 
from Douglass Flat, Chili Gulch, and t m able M 
? ? 
lama, Auchenia Californica L., besides a metacarpal “ probably 
a ofa some bones of a small horse, perhaps a Hipparion ; fro 
. Alameda County, Auchenia hesterna m the gravels near 
hora, two teeth of the living American Ta ifferent 
ato 
points, Mastodon Americanus, “up to an elevation little if at all 
exceeding 3,000 feet,” with also M. obseurus L.; at several locali- 
og River; HLguus caballus, E. excelsus oe E. poy’ sa 
tone implements (including tools, pestles, mo’ 3 
an ob etc.), a reported, from the gravels at the 
wing localities, and if some are doubtful, 
miles northeast, and 
Princeton; in Merced County, near Snellin : ; 
at Dry Creek; in Tuolumne County, at Table Mountain, 
