Professor Marsh’s Monograph of the Dinocerata. 185 
YY 
Mi Wil 4 
Ri . * * 
SURE 14.—Vertical median longitudinal section of skull of Dinoceras ge tees 
Marsh. One-eighth natural size. 6, brain-cavity; nta 
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Supra-occipital crest. 
Tue Lower Jaw. 
i 
ij. The lower jaw in Dinoceras is as remarkable as the skull. 
Most peculiar feature in the male is a massive decurved pro- 
on each ramus, extending downward and outward. ese 
» Pendent processes were apparently to protect the upper 
br be very liable to be 
in oken, In the female, this process is much oo 
whic” but is quite sufficient to protect the diminutive tus 
Overlaps it. 
