184 Professor Marsh's Monograph of the Dinocerata. 
“The large canine tusk is entirely enclosed in the maxillary, 
and, in the genus Dinoceras, its root extends upward into the 
base of the maxillary horn-core. In all known Dinocerata, 
she is a diastema between. “the upper canine and the pre. 
mo 
ars. 
Fiaure 12.—Horizontal section of skull of Tinoceras crassifrons 
Figure 13.—Horiz “ig ontal cas of skull of Dinoceras laticeps, Marsh hog 
th fi ty be 
are one-eighth natural size. ne 
of canine xe th; 6, brain-cavity; c, alveole of canine yor! A 
anterior olfactory chamber; f’, oro amber; ™s 
ma axillary protuberance; m, nasal bones: n’, nasa 
p’, parietal protuberance. 
specimens, contain no teeth. e premaxillaries 
much in form in the different genera and species of Dinocera® 
Two of the principal forms = shown in n pane 10 and Il. 
The palate is very narrow, and much excavated, ae 
front. The bony palate acted back as far as the last oe 
molar, anid, in some specimens, beyond. It is deeply exci 
“The premaxillary bones are edentulous, and, even in young 
Th 
