The Reign of Heptiles 



three well-developed toes on each hind foot, be- 

 sides a small inner or first toe ; the hind limbs 



Skull of the carnivorous dinosaur Ceratosaurus. Original over 

 two feet long. (After Marsh.) 



were much larger than the fore, and these ani- 

 mals customarily walked erect. Third and last 



Skull of Thespesius, a predentate dinosaur. Original over 3 feet 

 long. (After Marsh.) 



are the Ornithopoda, bird-footed, including her- 

 bivorous reptiles, many of which habitually 



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