I Id MUMMIED DINOSAl R 



carcass of a Brontosaurus, upon which it preyed. This is doI a fanciful 



mounting, for t hese very skeletons were found in close proximity to each 



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



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



i he flesh from its victim. 



Nfear the Allosaurus group is a skeleton of Tyrannosaurus, the last 



and mosl powerful of the carnivorous dinosaurs. This huge carnivorous 



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



Tyrannosaurus ' . . 



active and ferocious, preying upon ihe duckbilled and 



horned or armored dinosaurs which lived at the same time. 



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



r „ . , billed dinosaur Trachodon. One shows the animal erect 



Trachodon 



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



shellfish and plants of the ( Yetaceous swamps of Montana. 





^. 



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. 



Mos1 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.! 



L 



