148 The American Naturalist. [February, 
the Tragulide. The cervical vertebrx are undescribed, but the char- 
acters in general refer it to the Oreodontide rather than to any group 
of the camel series. The metapodial bones are distinct, and there are 
four in front and two posteriorly. Both sexes have a pair of low 
horn-cores or tuberosities on the parietal bones, but the male has other 
tuberosities and processes as follows: The superciliary borders are 
produced posteriorly into a prominent lobe, and a low tuberosity rises 
from the frontal at its anterior border, just in front of the orbit, 
Each maxillary develops an anteriorly projecting process above the 
last premolar tooth, and then rises into a huge elevated compressed 
plate with thickened apex at the side of the narrow nasal fissure. The 
latter opens far posteriorly, as the nasal bones are very short and wide. 
The molar teeth are Oreodontoid, and the superior canines are worn 
posteriorly, showing that there was a large inferior first premolar as in 
Oreodon. ‘I'he canine has also the triangular section seen in that 
family. The inferior canine is recumbent, and resembles an incisor. 
No superior incisors. ; 
The absence of superior incisors is a character which is uncommon 
in the Oreodontidæ, but is found in the genus Merycopater, and prob- 
ably in Pithecistes. The discovery of a horned member of the group 
is interesting. The female of the species was first described by Marsh 
under the name of Protoceras celer. It is probable, however, that it 
is nearly allied to, if not actually pertaining to the genus Stibarus 
Cope, described in 1873. The latter was founded on a fragment of 
lower jaw with premolar teeth, a part which has not been found in 
the species described by Drs. Osborn and Wortman. The latter was 
found by Dr. Wortman in the upper White River beds; the Stibarus 
obtusilobus is a smaller species, and comes from the lower beds of the 
same series. I give figures of parts of the skeleton from clichés kindly 
furnished by Dr. Osborn (Plates I and II).—E. D. Corr. 
The White Clays of the Ohio Region.—In southeastern 
Indiana and southwestern Ohio occur a series of clays overlying the 
glacial beds and differing from them in color and structure. There 
are similar clay deposits in southern Ohio outside the glacial boundary. 
Mr. Frank Leverett, in a paper published in the Amer. Geol., July, 
1892, cites evidence to show that these deposits are synchronous, that 
they have a common origin, that that origin is independent of both 
ice-dams and organic agencies, but is best explained by a fluvio-lacu® 
trine hypothesis. Furthermore, they furnish important evidence 
a the sequence of events in this region during the glacial 
period. 
