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At the same time there were Dinosaurs, or, as 
Professor Huxley has called them, Ornithoscelide—ze., 
bird-legged animals. With wonderful enterprise and 
zeal, skeletons of these enormous animals, weighing 
Ss. 
Fic. 19. —Dinosaur, Iguanodon Mantelli(from a photograph by Dollo 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 
E 2 
