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At the same time there were Dinosaurs, or, as 

 Professor I luxlcy has called them, Ornithoscclidaj — i.e., 

 bird-legged animals. With wonderful enterprise and 

 zeal, skeletons of these enormous animals, weighing 



Fig. 19. — Dinosaur, Iguanodon ManteIli(from a photograph by DJlo of the specimen 

 in the Brussels Museum). 



tons, have been collected by Professor Marsh and 

 his assistants in North America. Almost certainly 

 they had the power of walking upon their hind 

 legs, their tails helping to support them. In some 

 species, the nearer row of tarsals or ankle bones is 



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