EUTRACHYTHERUS 
9 
a | 
Fig. 47. Cast of the brain; A, from above; B, from the side—natural size. Cer, cerebellum; 
F, frontal lobe; H, hippocampal lobe; Oct, occipital lobe; Op, optic nerve; 7, temporal lobe; x, 
cast of cavity in squamosal bone; Na, case of interior of nasal cavity. 
represent the two large cavities in the upper part of the 
squamosum which are so characteristic of typotheres. 
The two large cavities clearly opened into the brain case 
