84 EXTINCT MONSTERS. 
the name Ceratosaurus,’ because its skull supported a horn. But 
the horn is not the only new feature presented by this interesting 
creature. Its vertebre are of astrange and unexpected type; and 
in the pelvis all the bones are fused together, as in modern birds. 
Externally, also, the Ceratosaurus differed from other members of 
the carnivorous group, for its body was partly protected by long 
plates in the skin, such as crocodiles have: these extended from 
the back of the head, along the neck, and over the back. An 
almost complete skeleton was found which indicates an animal 
about seventeen feet long. When alive it was probably about 
half the bulk of the Allosaurus mentioned above. (See Fig. 16.) 
Seen from above, its skull resembles in general outline that of a 
crocodile, the facial portion being elongated and gradually taper- 
Fic. 17.—Skull of Ceratosaurus. Top view. (After Marsh.) 
ing to the muzzle, with the nasal openings separate, and placed 
near the end of the snout. 
The teeth of this horned Dinosaur resemble those of the 
Megalosaur. Its eyes were protected by protuberances of the skull 
just above the cavity in which the eye was placed (see Figs. 17 and 
18). The brain was a good deal larger in proportion to the size of 
the animal than in Brontosaurus.and its allies ; so perhaps we may 
infer that it was endowed with greater intelligence, as it certainly 
was more active in its habits. The fore limbs, as in Megalo- 
¥ Greek—Zeras, horn ; sawros, lizard. Some authorities consider it to be 
identical with Megalosaurus. 
