Professor Marsh?s Monograph of the Dinocerata. 181 
“The frontal bones in Dinoceras mirabile are shorter than 
the nasals. In all of the known skulls of the Déinocerata, the 
median suture uniting the two frontals is entirely obliterated. 
The suture joining them with the-nasals in front, and with the 
maxillaries on the : side, is distinct in the type of Dinoceras. 
i. 
ty 
cf \ iit 
ors 7 —Skull of Discswas mira Marsh ; with brain-cast in natural posi- 
IGUR tion; see 
: 8.—The same view sala ang ppecinibn, of Dinoceras distans, Ma 1 
gures are bettas ee = J, frontal bone; ms seared Ty 
bone; m’, maxilla sunt - m, nasal bone; n’, nasal pro- : 
tuberance; p, parie’ bone; parietal protuberance ; pm, pre 
maxillary bone; 8, pont ae ital crest. 
f The m a la rtion of the lateral sur- 
"oe the a skull. They contain al “t e teeth, — those . 
ape: into the large m pair 0: 
n one young s nine the fron to-parietal suture is still 
“Pen, and passes * smelly ’straight line across the top of the 
