(//,'/•; 17' l)l.\<(SMh'S 



ii;i 



TUv ^ii;anti(' skeleton in (he cciitcr ol' the liiill is llic lni|i;(' extinct 



rei)tile, the diuosaiir Ih-onlosdurns, fouiid in the .lunusic \H'<\r< of Wyoin- 



iiii>;. It is the only niouuted sjx'ciineii of its kind in tlie 

 Brontosaurus * ■ • i ,• i i i • i 



woi-hl and more than two-thu'ds ol the skeleton is the 



ori.ii'inal i)(^ti-ili(Hl hone. It is si\t\-si\ feet ei<^ht inches in length. 



sixtecMi feet in hei<«;ht and is estimated to have wei.nhed when ali\-e 



thirty-five tons. Brontosaurus is one of the lar<!;est <:;iant re|)tiles and 



as is inihcatcHl by its teeth was herbivorous, ))r()l)ably li\in<;- on the niwk 



water w(hhIs of the nearly sea-level marshes of \Vyoniin<2;. Contrasted 



with the herbivorous Brontosaurus is the carnivorous dinosaur Allo- 



saurus, mounted to represent the animal feeding on the 

 Allosaurus ^ t^ i • i • i 



fallen carcass of a l^rontosaurus, upon which it ])rev(Ml. 



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

 About natural size. 



This is not a fanciful mounting, for these very skeletons were found 



in close proximity to each other in the Jurassic beds of Wyoming, and 



the skeleton of 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 portion of a skeleton of Tyrajinosaurus, 



the last and most powerful of the carnivorous dinosaurs. A complete 



_ skeleton is temporarily placed in the Hall of the Age of 



Tyrannosaiirus . p • • i t^- tt h 



Man, as there is not room for it m the Dinosaur Hall. 



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 



