THE JURASSIC PERIOD. 



99 



in length (80 J inches). 1 There 

 were several other genera of similar 

 nature and of bulk only inferior 

 to these monsters. The tribe was 

 most abundant and most special- 

 ized in America, which was doubt- 

 less its place of origin; but some 

 European forms (notably Cetio- 

 saunis of England) were so closely 

 related as to be regarded by some 

 as generically identical. 



The typical ornithopocl (bird- 

 footed) dinosaurs were bipedal in 

 habit, much as the carnivores were. 

 On the hind limbs there were 

 usually only three functional toes, 

 so that they left a bird-like track ; 

 the fore limbs, however, had five 

 digits. Camptosaurus, known both 

 from America (Morrison beds) and 

 Europe, and nearly related to the 

 European Iguanodon of the AVeal- 

 den, was one of the largest of the 

 ornithopocl dinosaurs, measuring 

 about 30 feet in length, and about 

 18 in height, in the walking 

 posture. Other related forms, 

 like Nanosaariis or Laosaurus, 

 were not more than three or four 

 feet in height and were the small- 

 est of this group known. 



The stegosaurs, like the sauro- 

 pods, were quadrupedal in habit, 

 and, like them, had solid bones. 

 They were curiously armored, and 

 formed a group of very remarkable 

 creatures that frequented England 



1 Riggs, Amer. Jour. Sci., 1903 



