354 ROY L. MOODIE 
superior sinus. The skull of Hoplophoneus is longer than in 
Dinictis and the brain more dog-like. The arrangement of sulci 
in the present cast (fig. 10) is almost precisely that figured by 
Bruce (’83) for Hoplophoneus. Bruce’s figures, however, show a 
somewhat more robust brain than the present specimen. In all 
other respects, save only the absence of a high sagittal sinus in 
Bruce’s figure, the two specimens agree. I am not, however, 
fully satisfied that the present cast represents Hoplophoneus. 
Its beautiful preservation justifies its description, and we must 
await future associations of skeletal parts with a good brain 
cast for a positive determination. 
That the cast is not cynoid, and hence does not represent 
Daphaenus, the bear-dog of the Lower Oligocene, is evident in 
the absence of the sulcus ectolateralis in the present cast (fig. 10). 
Its felid characters are evident in its robust cerebrum, in the 
arrangement of the sulci (figs. 9 and 10), and in the base of the 
brain (fig. 11), especially in the relations of the remnants of the 
trigeminal nerve. 
The endocranial cast of this undetermined felid (figs. 9, 10, 
and 11) differs markedly from that of Dinictis (figs. 3 and 4), 
especially in its more sharply marked sulci and its more advanced 
cerebral pattern. It is not so cat-like as Dinictis. The cerebrum 
does not overhang the cerebellum. Dorsally, the lateral sulcus 
(S.lat.) runs without interruption from posterior to anterior end 
of cerebrum, thus differing considerably from Dinictis (fig. 3). 
The ansate sulcus is not indicated, though it is probably proper 
to speak of the anterior end of this long lateral sulcus as the 
coronal sulcus (S.cor.). There is no postero-lateral sulcus and 
the lateral sulcus ends abruptly against a gyrus separating the 
sulcus from the tentorial depression. The suprasylvian sulcus of 
Hoplophoneus, as figured by Bruce (’83), differs from the present 
specimen in that Bruce’s specimen shows an interruption on the 
postero-dorsal part of the sulcus. There is no such interruption 
in the present specimen. The sulcus runs without interruption, 
clearly and deeply marked (fig. 10), being the more deeply 
impressed posteriorly. This may be merely a specific difference. 
