0. C. Marsh— Notice of New Tertiary Mammals. 251 
mainly based, were presented to Yale College Museum by the 
Rey. Thomas Condon, of Oregon. 
Anchitherium celer, sp. nov. 
The smallest species of Anchitherium from the American 
Tertiary is indicated by some fragmentary remains in the Yale 
useum, from the Miocene of Nebraska. These fossils pertain 
Anchitherium Bairdi. The orbit is placed well forward. The 
ridge below it is especially prominent, and much elevated 
above the molar 3 The crowns of the latter are remark- 
ably short. The four posterior molars have their inner margins 
ona line. The last upper molar is quite smal 
Measurements. 
Space occupied by last four upper molars, -- Ye sca 
Extent of three upper tre molates.< -.cciduds 62 ees 27° 
Antero-posterior diameter of last upper premolar, -- -- -_-- 10° 
Transverse diameter,..___...._._-__- Sok ae eee 3 
Antero-posterior diameter of last upper molar, --.--- ---- -- 85 
Transverse @iameter.o joc ee 
tance of lower margin of orbit above last upper molar, 20- 
The type specimen of the species was presented to Yale 
College Museum by Capt. W. A. Jones, of the U. S. Engineers. 
Protohippus parvulus Marsh. 
(Equus parvulus Marsh, this Journal, xlvi. p. 374, 1868.) 
A Te€xamination of the remains of this species originally 
described, and of the other fossils found with them, clearly indi- 
oval in outline, and is connected with the antero-median column. 
This molar is from near the middle of the series, and measures 
apes antero-posterior diameter. Other fragmentary teeth indi- 
cate that the incisors were very small, and the canines large. 
The bones of the feet preserved, which may with considera- 
ble certainty be referred to the same individual, Pg Soman the 
manus and pes had the lateral digits developed, as in Hipparion. 
