480 The Creodonta. [May, 
limbs are smaller in relation to the skull than in modern Carniv- 
ora. The least species is the Æ. acer of New Mexico. 
We. 23- Fig. 24- W 
t 
. 23.—Esthonyx burmeisteri Cope, part of skull with lower Pang? from A al 
satch epoch of the Bi orn, A beg T ikee natura al size; Tig. ©? 
view ; inferior ; The 
vertebra; 4, carpus from front; o. proximal view ; ¢, part 0 
ternal view. Original, from A ‘Report U. S. Geol. Survey Terrs., 
Vol, HI: 
OXYÆNIDÆ. 
The genera of this family are best explained by the — 
analytical table. The pertinence to it of the genus Te 
rium Filh., is not certain. The only genera W olar, a 
character of the narrow transverse third superior true MIN" 
Oxyzena and Pterodon. | 
I. Inferior molars with three anterior cusps. P i! ; 
Cusps obtuse; fourth premolar with tubercular heel ; formula x yett’ 0g | 
Cusps acute; heel of fourth premolar cutting; formula } 3+-++**""" : 
II. Inferior molars partly tubercular-sectorial, partly a , Prop 
Superior molars unknown Si 
1 These characters are derived from an examination of the oreas st 0 1 
preserved in the Mus. Jardin des Plantes, which the permission 44 which I pr 
enabled me to make. Other characters of the fourth premolar, 
hitherto copied from others, are inexac 
