MUMMIED DINOSAUR 



in; 



Trachodon 



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

 hilled dinosaur Trachodon, One shows the animal ereel 

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

 shellfish and plants of the Cretaceous swamps of Montana. 



Mummied Most wonderful, perhaps of all the specimens shown 



Dinosaur here is a "inunnny" of Trachodon in which the texture 



of the skin is preserved. 



The animal is lying on its hack and, in spite of its crushed 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 hones like a close-fitting glove, and was subsequently buried by a 

 flood. 



■M 



Section of the skin of Trachodon showing the small scutes with which the animal was covered. 

 About natural size 



Other specimens show T n in the hall include the smaller carnivorous 

 dinosaurs, the horned dinosaurs with, in one instance at least, a skull 

 seven feet in length, and giant birds possessed of teeth. There is also the 

 finback lizard, one of the most ancient of fossil reptiles; Diadedes, a reptile 

 with a solid-boned skull and Eryops, sl primitive amphibian. The finest 

 collection of fossil turtles in the world will be found on the south side of the 

 hall. 



In the Tower of the Southeast Pavilion are displayed the fossil fishes 

 which belong to a much earlier period than the mammals 



„ ., _. , and reptiles, some of them having lived twentv to fifty 



Fossil Fishes - nr r * 



millions of years ago. Many of these forerunners of back- 

 boned animals are quite unlike any living fishes and are probably only very 

 indirectly related to them; some were small, curiously encased in shells; 



