110 



MUMMIED DINOSAl R 



can-ass of a Brontosaurus, upon which it preyed. This is not a fanciful 



mount ing, for these very skeletons were found iii close proximity to each 



other in the Jurassic beds of Wyoming, and the skeleton on the fallen 



Brontosaurus shows gouges made by the teeth of AJlosaurus as it tore 



the flesh from its victim. 



Near the AJlosaurus group is a skeleton of TyrannosauruSi the last 



and most powerful of the carnivorous dinosaurs. Tin- huge carnivorous 



_, reptile rivalled the Brontosaurus in size and was far more 



Tyrannosaurus ■ 



active and ferocious, preying upon the duckbilled and 



horned or armored dinosaurs which lived at the same time. 



To the left of Brontosaurus are two complete specimens of the duck- 

 billed dinosaur Trachodon. One shows the animal erect 

 and standing on guard, while the other is shown feeding on 



shellfish and plants of the Cretaceous swamps of Montana. 



Trachodon 



RESTORATION OF NAOSAURUS 



One of Nature's jokes. Professor Cope, who was also a joker, suggested that the 

 high fin served as a sail, by means of which Xaosaurus sailed over the lakes near 

 which it lived. 



Most wonderful perhaps of all the specimens shown here is a 

 "mummy" of Trachodon in which the texture of the skin is preserved. 

 Mummied The animal is lying on its back and, in spite of its crushed 

 Dinosaur condition, its form is easily distinguishable. It probably 

 died on a sand hank or near a shoal where the hot winds dried up the 

 flesh until the skin adhered to the bones like a close-fitting: glove, 

 and was subsequently buried by a flood. [See Handbook No. 5, 

 Dinosaurs.! 



