32 Bulletin American Museum of Natural History. [Vol. XXXIV, 
Measurements.— (Continued.) 
x = = 
sia|a4i, 
S = 3 a ‘s 
aiztio|s|a 
“2 te 2 ee 
ie eral oer 1-8 
= 6 C} ) 5 
Ee Z Z Zz Z 
tg RCT OpOerer mr CuaIeUer Ee Sea dae eo | | 
“ height of crown | | 
P, anteroposterior diameter.......-.../......0...... 2 | 5.3 
SRG TA NER RS o fre Bech ha St YY oldie we dees «= 4.9 4.4 
M; anteroposterior diameter..................05.- 6.9 noe 7.3 
‘“ transverse barat See ec ee oe ae 4.7 4.1 
“ height of protocone from base of enamel........ 6.9 6.2 
‘¢ anteroposterior length of heel.................. 2.5 2.5 
M, anteroposterior diameter..................-.-- | 4.0 4.5 | 4.6 
“transverse 5 Ae OV RAIS Cae Sa Ty my Lee 3.6 3.2 | 3.8 
Uintacyon cf. vorax. 
A larger species is represented by No. 15748, two lower jaw fragments of 
one individual from the Gray Bull beds of Shoshone River in the Big Horn 
Basin. It is very probably distinct from the Middle Eocene species with 
which I have compared it, but the specimen does not show any clearly 
distinctive characters. 
Measurements. 
Ps-m3; ete SN, ee Nea Be oe a apie dee al fart ip acy, Th orale £2 | Air SR wren Oe Ou Gar al ane ROE) 26.5 
Deere ae OR eee ei bee nb ae eae alt oo otek Awa hele ek mex 5.7 
M, es “ Ree Marsan sll ee Pe tech i ORIN, Peer Gee, Bake 6.0 xX 4.2 
eA Cer tant, Ceineters POY Mt aes aos bas Lakeshs UC hieai on Se eee 3.3X 4.7 
Be We MCMOGNT Melee co tos yeas aiva ede oes bce weds eae eee LY ge 
Miacis Cope 1872.! 
Type, M. parvivorus from the Lower Bridger of Wyoming. 
To this genus may be referred two species from the Lower Eocene. The 
differentiation of the carnassial dentition is a little less advanced than in 
1 Pal. Bull. No. 3, Aug. 7, 1872; Proc. Am. Phil. Soc., Vol. XII, p. 470. 
