Professor Marsh’s Monograph of the Dinocerata. 191 
other known mammal, recent or fossil, and even less than in 
some reptiles. It was, indeed, the most reptilian brain in any 
0 mal. In Dinoceras mirabile, the entire brain was 
Figure 24.—Skull of Liimnohyus robustus, Marsh. Middle Kocene. 
Figure 25.—Skull of Amynodon advenus, Marsh. Upper Eocene. 
tae ee Se Ee Be Ree a ST) ee Ce aE eR Ew) 
“The size of the entire brain, as compared with that of the 
cranium, is shown in the accompanying cuts, figures 7, 8, an 
larger than the cerebellar portion. 
“The cerebral hemispheres did not extend at all over the 
Cerebellum or the olfactory lobes. The latter were large, an 
Continued well forward. 
