U. &. GEOLOGICAL SURVEY BULLETIN 613 FLATE X 
A. ALLOSAURUS, 
A great : di or megalosaurian. Restored by Charles R. Knight from bones found in the Morrison 
for faations, Colorado, 
B. STEGOSAURUS. 
A huge lizard that lived at the ti fthed ition of the Morrison formation. Restoration by Charles R. Knight. 
