110 



MUMMIED DINOSAUR 



carcass of a Brontosaurus, upon which it preyed. This is not a fanciful 

 mounting, for these very skeletons were found in dose proximity to each 

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

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

 the flesh from its victim. 



Near the Allosaurus group is a skeleton of Tyrannosauras, the last 

 and most powerful of the carnivorous dinosaurs. This huge carnivorous 

 reptile rivalled the Brontosaurus in size and was far more 

 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. 



Tyrannosaurus 



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 Naosaurus 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 bank 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.] 



