36 O. C. Marsh—Notice of some new Fossil Mammals 
The remains were found by Lieut. Wann, and the writer, in 
the ‘‘Mauvaises Terres” deposits, near Sage Creek, Western 
Wyoming. The geological horizon is lower Miocene, or per: — 
haps Hocene. 
eam minor, ne noy. 
Measurements. : 
Antero-posterior diameter of lower molar, 10 lines. © 
Transverse diameter of front lobe, at summit, . Ses, Bae 
Transverse diameter of posterior lobe, at summit, ot eae 53.9 
e only known specimens of this species were found by the 
writer at Grizzly Buttes, near Fort Bridger, Wyoming, in the — 
same deposits as the preceding species. 
Lophiodon Bairdianus, sp. nov. 
mains on which this species is based consist of portions 
of several skeletons, with numerous teeth which show consid- 
ime e iy 
moreover, by the enamel of the teeth, which, instead of beimg 
coarsely wrinkled, is _— smooth, or marked by very delicate, 
irregular striz. ; 
Measwremen 
eras sh —- of upper jaw, oie die the three gue 
| aaalam ano diameter of last upper molar, eewcds 
Transverse diameter of same a 1025 = 4 
Eee of fragment of lower jaw with three posterior : 
25 
—e— ee ee 
eedings Philadelphia Pete of Natural Sciences, 1870, p. 113. 
t Procestiags Philadelphia Acs ee 870, p. 109. 
_ 
