no. 8 SKULL OF BRIDGER CREODONT—GAZIN 15 
Neither the angle nor the top of the coronoid process are complete 
on either side of the P. ulta mandible, but it is seen that the slope of 
the anterior margin of the ascending ramus is not so steep as shown 
for P. ferox. The condyle is transversely very elongate and carries 
the articular surface well forward along the inferior as well as the 
superior surface. The outer portion of the superior surface extends 
down on the anterior part of the condyle where articulation occurs 
with the well-developed process anterior to the glenoid surface of 
the squamosal, almost locking the lower jaw in place, as in some 
mustelids. The masseteric fossa would appear to be weakly defined 
near the lower margin of the jaw but is deeply impressed in the upper 
portion. The deeper part of the fossa is limited downward by a ridge 
which extends forward from just below the condyle. The crest 
bounding the fossa anterodorsally extends downward and forward 
from the anterior margin of the coronoid process, but disappears 
upon reaching a position almost below the posterior margin of Ms. 
On the medial surface of the jaw it is seen that the symphysis ex- 
tends posteriorly to a position below about the anterior margin of 
P, and exhibits a deep pit forward near its posterior limit for certain 
muscles, including the geniohyoid and probably a part of the digastric. 
The inferior dental foramen is located above the shallow vascular 
notch in the lower border of the jaw and about opposite the ridge on 
the outer surface that limits the deeper part of the masseteric fossa 
ventrally. Posterior and ventral to the inferior dental foramen the 
medial surface of the jaw is distinctly concave. There is no particu- 
lar indication of a sulcus mylohyoideus. 
Lower dentition—As noted above, the hyena-like appearance of 
the teeth (pl. 4) in Patriofelis is most noticeable in the lower series, 
particularly the premolars. The resemblance in the molar series is be- 
tween nonhomologous carnassials and is upset by the presence of the 
small M, in Patriofelis. 
The number of lower incisors is clearly two in the University of 
Utah specimen. The smaller, medial incisor is distinctly posterior to 
the lateral tooth and rather flattened transversely. The lateral incisor 
is less procumbent and shows a relatively broad anterior surface. The 
crowns of both are blunt with wear. The canines have massive roots 
and are comparatively close together, much crowding the incisors. 
Their crowns are likewise considerably worn. 
P, is neither crowded nor oblique as in P. ferox. It shows a short 
diastema between it and the canine, and though small, is relatively 
broad and two rooted. It carries a minute cuspule anterior to the 
principal cusp and a low, blunt cusp on the talonid. Ps is similar but 
