6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
PATRIOFELIS ULTA Leidy, 1870 
Synonyms.—Limmnofelis latidens Marsh, 1872; Oreocyon latidens 
(Marsh), 1872. 
Type——Lower jaws with P,—M, (incomplete) in left ramus 
(U.S.N.M. No. 105). 
Referred material—The upper premolar (P* according to Marsh, 
Wortman, and Thorpe, but P* according to Matthew) upon which 
Marsh based the species Limnofelis latidens is decidedly smaller than 
either P* or P* in A.M. No. 13145—the skull material described by 
Matthew as Patriofelis ferox. Its length is about intermediate be- 
tween that of P* and P* in the skull of P. ulta described in this paper. 
Moreover, this premolar is reported to be from the Grizzly Buttes 
and hence lower Bridger, the horizon which seems characterized by 
P. ulta. Hence, Limnofelis latidens and Oreocyon latidens are more 
likely synonyms of Patriofelis ulta rather than, as Wortman (1902) 
and Matthew (1909) indicate, of P. ferox. 
Besides the University of Utah skull and jaws (No. B50) belong- 
ing to Patriofelis ulta, there is in the U. S. National Museum (No. 
21365) a right mandibular ramus of this species, with P,—P, par- 
tially erupted, Dp, loose, and M, and M, but little worn. The lower 
molars are only slightly smaller than in the type, but the horizon 
represented is believed to be very low in Bridger C, immediately above 
the Green River shale just to the northeast of Twin Buttes. 
PATRIOFELIS FEROX (Marsh), 1872 
Synonyns.—Patriofelis leidyanus Wortman, 1892; Aelurotherium 
leidyanum (Wortman), see Adams 1896. 
Aelurotherium latidens Wortman (not Marsh), Igoi. 
Aelurotherium bicuspis Wortman, Igot. 
Patriofelis latidens Thorpe (not Marsh), 1923. 
Type-—Fragment of left ramus of mandible with M, (Y.P.M. 
No. 11865). 
Referred material—Included among the materials referred to 
Patriofelis ferox are the type specimens of the above species placed 
in synonymy. These are the immature lower jaw with Dp.—Dp, 
(P.U. No. 11375) of P. leidyanus ; the lower jaw with a canine, Dps, 
Dp,, and M (Y.P.M. No. 11756), which was “‘another specimen” in 
Marsh’s description of Limnofelis latidens, but which Wortman indi- 
cated as a type for Aelurotherium latidens; the lower cheek tooth 
regarded by Matthew Dp, (Y.P.M. No. 11755) of Aelurotherium 
bicuspis; and the symphysial portion of a pair of lower jaws with 
