6 
Cope.] g 
[April 7, 
Bos, Linn. 
Extremity of a femur, several patelle and fragments of metatarsals of 
a large species of ox or bison are preserved with the others. The species 
is not yet determined. 
There are, perhaps, two other species of ungulate animals not as yet 
determined. 
Ursus, L. 
Ursus pristinus, Leidy. 
Arctodus pristinus, Leidy. Proc. Acad. Nat. Sci., Philada., 1854, 90, 
Holmes’ Postpliocene Fossils §. Carolina, 1860, 115, Pl. xxiii, f. 3-4. 
This bear has been known hitherto by a molar of the lower jaw found 
by Prof. Holmes near Charleston, 8. Ca., and the references above indi- 
cate descriptions and figures of this tooth alone. Mr. Wheatley’s collec- 
tion contains the first and second molars in a portion of the right ramus 
of the mandible, and the canine and first, second and third molars of the 
left ramus separated from it. There are also vertebra of bears from the 
cervical and dorsal regions, which are appropriate as to size, and were 
found at near the same time as the teeth. 
A character which at once distinguishes this bear from all those now 
living inthe northern hemisphere (faunally speaking), and those known 
to have inhabited it during the postpliocene period, is seen in the first 
molar. Instead of the usual two series of tubercles, it has on its ante- 
rior half a single rather obtuse crest, above the outer side of the crown. 
The crest commences with the apex of an elevated conical tubercle, which 
marks a point three-fifths the length of the tooth from its posterior ex- 
tremity. ‘Two very small worn tubercles are seen behind it on each side, 
in the specimen, while the’ greater part of the surface of the crown is 
nearly plane, and covered by unbroken enamel. It is a little depressed, 
and compressed from the outer side at the posterior third. The enamel of 
the inner side of the crown is smooth, of the outer side obsoletely ru- 
gose. The second inferior molar is about as long as the first, but wider, 
and of different character. The triturating surface is parallelogrammic 
rounded at the ends, and narrowed at the anterior third, and con- 
tracted, as compared with the width of the base of the crown. 
The enamel, though worn, is nowhere worn through, and its sur- 
face is remarkable for the almost absence of tubercles. The grind- 
ing surface is concave transversely, and is bounded by elevated mar- 
gins. The inner and outer display each three obtuse elevations, the 
latter the better defined, the anterior the most elevated and connected by 
a low cross ridge, which is depressed in the centre. The inner sides of 
the crown is swollen at the base, and more oblique than the outer ; both 
are marked with obsolete ridges, which descend from the grinding face, 
those of the outer most distinct. The last inferior molar is two-thirds 
the length of the penultimate. The form is oval, broad anteriorly, nar- 
row posteriorly. The crown is low and flat, without tubercles, the 
margin a little elevated, and interiorly and posteriorly mammillated ; it 
has a single compressed root. 
