PLATE 2 
EXPLANATION OF PLATES 
4 Lateral view of endocranial cast of Diplodocus longus. After Osborn. 
She 
ABBREVIATIONS 
Sac.End., saccus endolymphaticus II to XII, cranial nerves 
Int.Car., internal carotid arteries 
5a Upper view of endocranial cast of Triceratops serratus. After Hatcher 
from Marsh. . 
5b Lower view of same. Both figures X }. 
ABBREVIATIONS 
Olf., olfactory tract Ve., vein 
Cer., cerebrum Pit., hypophysis 
Cb., cerebellum IT to XII, cranial nerves 
6a Lower view of endocranial cast of Triceratops serratus. After Hay. 
This and the two following figures give Hay’s interpretation of the casts, as 
opposed to that given by Hatcher. 
6b Upper view of same. 
6c Lateral view of same. All figures X i. 
ABBREVIATIONS 
Olf., olfactory tract Car., carotid artery 
Cer., cerebrum Ju.v., jugular vein 
Ve., vein IT to XII, cranial nerves 
Pit., hypophysis Ep., epiphysis 
Op.a., base supposed ophthalmic artery 
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