PLATE XLIV. 



Jurassic Dinosaurs. — Predentata. 



STEGOSAURID.E. 



Page. 



Fig. 1. Tooth of Stegoaaurus ungulatus Marsh; a, natural size; b, c, d, twice 



natural size 187 



b, outer view; c, end view; d, top view. 



Fig. 2. Tooth of Priconodon craiaus Marsh ; twice natural size 187 



a, outer view; b, end view; c, inner view. 

 Fig. 3. Outline of skull of Stegosaurus ungulatus, with braiu cast in position; 



seen from above ; one-half natural size 187 



Fig. 4. The same brain cast; seen from the left; one-half natural size 187 



c, cerebral hemispheres; cb, cerebellum ;/, orbital cavity; /', temporal 

 fossa; mi, medulla; oc, occipital condyle; ol, olfactory lobes ; on, optic 

 nerve; op, optic lobes. 



332 



