Geology and Mineralogy. 155 
stone at Rochdale and in Trenton in the same near Newburgh, N. Y., ibid., xix, 
71, 1880.—J. P. Lestey: On the discovery by P. Frazer, of Hudson River or 
Trenton Buthotrephis in slates on the Susquehanna, near the borders of Penn- 
sylvania and Maryland, ibid., xix, 71, 1880.—Proc. Amer. Phil. Soc., xviii, 365. 
The Cave Bear of California , D. Corz.—In explor- 
ing a cavern in the Carboniferous limestone of Shasta county, 
Cal es D. Richardson discovered the skull of a bear beneath 
several inches of cave earth and stalagmite. The specimen is in 
a good state of preservation, and demonstrates that the cave bear 
of that region was a species distinct alike from the cave bear of 
the East ( Ursus pristinus), and from any of the existing species. 
In dimensions the skull equals that of the grizzly bear, but it is 
very differently proportioned. The muzzle is much shorter, and 
is wide, and descends obliquely downward from the very convex 
frontal region. It wants the large postorbital processes of the 
grizzly, but has the tuberosities of the polar bear (U. maritémus), 
which it also resembles in the convexity of the front. Sagittal 
crest well developed. Three (one median and posterior) incisive 
foramina: three external infraorbital foramina. The teeth are 
pe 
> 
vertically above the posterior extremit of the last molar, 141; 
width between inner border of posterior molars, 076. The spe- 
cles may be called Arctotherium simum.—American Naturalist, 
December, 1879. 
n the Miocene Fauna of Oregon; by E. D. Copz.—This 
te con 
Seven species of mammals, discovered in the Truckee beds of the 
White River formation of Oregon. Since the date of the latter 
paper Professor Cope has been engaged in exploring the region; 
the expeditions being mostly under the direction of Jacob L, 
Wortman.” This aper contains the descriptions of some of the 
Rew species obtained, namely: Hesperomys nematodon, Sciurus 
ortmant, Paciculus insolitus, Canis lemur, Amphi entop 
tychi, Archelurus debilis, Hoplophoneus platycopis, Chenohyus 
ecedens, Thinohyus trichenus, Puleocheerus subequans, Meryco- 
pater Guiotianus, Coloreodon ferox, Coloreodon macrocephalus, 
Professor Cope states that Mr. Wortman, to whom he is indebted 
