1915.] Matthew and Granger, Lower Eocene Wasatch and Wind River Faunas. 5d 
versely wide; (5) slight internal flange on deuterocone of p‘; (6) p? with no internal 
cusp; (7) size smaller than O. forcipata, averaging less than lupina, considerably larger 
than transiens. 
This species is about as common as O. forcipata in the Big Horn Wasatch, 
and is readily distinguished from it in the characters, 3 to 7, cited above. 
It is larger and somewhat more progressive than O. transiens which appears 
to be ancestral. One or more of the specimens from New Mexico referred 
by Cope to O. morsitans may belong to this species but the type of Cope’s 
species is clearly distinguished by the smaller metaconid and heel on the 
molars. , 
Measurements. 
16199 16726 15193 
Upper teeth, im? 87.5 
; 3 cm? 2. 81 
‘‘ premolars p'—p* 41.5 42 
‘* molars m!-* ys (eee 23 
Diameters of p* a-—pxtr 14.5 X 13.5 15 X 14 
“i  m! zy 14 x 14 16,5 *< 1625 
(5 66 m2 (a 
Lower teeth, Ci—-M2 80 88 
‘premolars pi—ps B10 40.5 
‘* molars M2 28.5 2040 
M, anteroposterior 17 15.5 
‘* transverse 11 9 
‘“‘ length of heel DO 5 
Oxyena pardalis sp. nov. 
Type, A. M. No. 15607, anterior portion of lower Jaws with a large part of the 
skeleton, from the Lost Cabin Horizon, Big Horn Basin, Wyoming. Paratype, No. 
15608, lower teeth from Lysite beds of Big Horn Basin, Wyo. 
Distinctive characters: (1) trigonids of lower molars longer than wide, metaconid 
of m vestigial and heel much reduced; (2) m: smaller than mi; (3) premolars moder- 
ately robust, ps with distinct anterior basal cusp and exceptionally broad heel, canines 
more massive than O. forcipata; (7) size larger than O. forcipata, much larger than 
O. lupina. 
The skeleton parts of the type of O. pardalis are in close agreement with 
Oxyena forcipata. The limb bones, feet and many of the vertebre are 
very well preserved, much more perfect and complete than in the skeleton 
of O. forcipata from the Gray Bull horizon of the Big Horn Basin described 
by Cope,! Osborn,” and Wortman.’ 
1 Tertiary Vertebrata, p. 318, pl. xxivb, xxive. a 
2°Bull. A. M. N. H., Vol. IV, p. 108, fig. 9; ibid., Vol. XIII, p. 276, pl. xviii. 
3 ibid., Vol. XII, p. 140, pl. vii. 
