PLATE X. 

 Jurassic Dinosaurs. — Theropoda. 



CERATOSAURID.fi, DRYPTOSAURID.E, AND CtKLURID^E. 



Page. 

 Fig. 1. Pelvis of Ceratosaurus nasieornis Marsb; side view; seen from the left; 



one-twelfth natural size 161 



The three pelvic hones are coossified. 

 Fig. 2. Pelvis of Allosaurus fragilis Marsh; the same view; one-twelfth nat- 

 ural size 163 



a, acetabulum; il, ilium; is, ischium; p, pubis. 



Fig. 3. Pubes of Cnlurus agilis Marsh ; one-fourth natural size 156 



Fig. 4. The same bones; one-fourth natural size 156 



a, side view; b, front view; c, foot, or distal end. 

 264 







