Fig. 5. 



Pelvis of Ceratosaurus nasicornis, Marsh ; side view, seen from the left. 

 Fig. 6. 



Pelvis of Allosaurus fragilis, Marsh ; the same view, a, acetabulum ; 

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

 , Both figures are one-twelfth natiiral size. 



