PLATE VIII. 



Jurassic Dinosaurs. — Theropoda. 



Ceratosauridje. 



Paga 



Fig. 1. Skull of Ceratosattrua naaioomia Marsh ; side view 157 



Ik;. 2. The same skull ; front view 157 



Pig. 3. The same skull, with brain cast ; seen from above 159 



a, nasal opening; b, horn core; c, autorbital opening; c', cerebral hemi- 

 spheres; d, orbit; t, lower temporal fossa; /, frontal bone; /', foranienin 

 lower jaw; ft, supratemporal fossa; j, jugal; m, maxillary bone; m', 

 medulla; n, nasal bone; oc, occipital condyle; oil, olfactory lobes; pf, 

 prefrontal bone; pin, premaxillary bone ; q, quadrate bone ; qj, quadrato- 

 jugal bone; (, transverse bone. 

 All the figures are one-sixth natural size. 

 260 



