no. 8 SKULL OF BRIDGER CREODONT—GAZIN 7 
C-P, (Y.P.M. No. 10940) which was among the “additional re- 
mains” Marsh had when he proposed Oreocyon for L. latidens, and 
which Thorpe regarded as the type of O. latidens when he attempted 
to preserve the species name Patriofelis latidens. 
Additional materials of Patriofelis ferox, including the mounted 
skeleton composed of A.M. Nos. 1507 and 1508 in the American 
Museum, are listed by Matthew (1909, p. 420). In the National 
Museum, besides the unused portions of A.M. No. 1508 (U.S.N.M. 
No. 5916) received in an early exchange, there are several parts of 
a comparatively large skull (U.S.N.M. No. 21364) obtained in the 
upper Bridger, probably C, to the north of the saddle between Sage 
Creek Mountain and Cedar Mountain, and the right ramus of a lower 
jaw, mentioned by Denison (p. 173) as exhibiting Dp.—-Dp, with 
M, erupting (U.S.N.M. No. 13318), from the upper part of Bridger 
C between Sage Creek and Hickey Mountain. M, in the latter speci- 
mens is not completely exposed, but its size is clearly much greater 
than in P. ulta. 
PATRIOFELIS (PROTOPSALIS) TIGRINUS (Cope), 1880 
Type——Two lower molars, a lower canine, and certain bone ele- 
ments (A.M.N.H. No. 4805). 
Discussion—The type of this species is reported by Matthew 
(1915) to be from the Lost Cabin beds of the Wind River series. No 
additional specimens are known. I have retained Protopsalis as a 
subgenus rather than completely suppressing it in Patriofelis as Mat- 
thew did in 1909, and in preference to recognizing full generic rank 
as Denison did in 1938. Protopsalis appears to be structurally inter- 
mediate between O-xyaena and typical Patriofelis, but possibly a little 
closer to Patriofelis, although there is greater difference between it 
and Patriofelis than between the middle Eocene species of Patriofelis. 
This can perhaps be best represented by regarding it as a distinct sub- 
genus. Nevertheless, P. (Protopsalis) tigrinus is a rather gigantic 
form and surely is not the species which gave rise to the compara- 
tively small lower Bridgerian forms of Patriofelis. 
?PATRIOFELIS COLORADENSIS Matthew, 1909 
Type—Left ramus of mandible with C-P, and M, (A.M. No. 
2691). 
Discussion.—I suspect, as did Denison (1938), that this species be- 
longs to Patriofelis rather than Ambloctonus where Matthew placed it 
in 1915. In addition to characters cited by Denison, I note that 
