Figure 11 

 The bony skeleton of the Vertebrate reached its most massive development 

 in the extinct reptilian Dinosaurs. The skeleton shown in this figure is from 

 the largest known species, the giant Broniosaurus excelsus. The specimen was 

 collected at Como Bluff, Wyoming, in 1881 and has just recently been mounted, 

 as shown, in Peabody Museum, Yale University. It measures 67 feet in 

 length and is 16 feet high over the hips. The weight of the animal is esti- 

 mated at about 40 tons. For comparison of relative size, a full sized human 

 skeleton is shown. Reference should be made to Lull's " Organic Evolution " 

 (Macmillan) for complete description. 



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