CliEAT 1)1 \ OS M US 



95 



inillioii ycai's ati'o it si'tllcd to the bottom ot a western lake wliccc it was 



i»;ra(liiall>- covered with sand and mud and slowlx' tui-ned into stone. 



'I'he iii«>;antie skeleton in the ctMiter of tlie hall is the hu<2;e extinct rep- 



_ , til(\ the dinosaur Bronfosdiiru^, found in the Jurassic beds 



Brontosaurus 



of Wvomini;'. It is the only mounted s|)ecimen of its kind 

 in the world and morc^ than two-tliirds of the sk(>let()n is the ()ri<»;inal pet- 

 rified hone. It is sixty-six feet ei<;ht inches in len^,tli, sixteen feet in 

 hci«>;ht and is estimatinl to have w(M«2;h(Ml when alive thirty-five tons. 

 Brontosaurus is onv of the lar<>;est ^iant rei)tilesand as is indicated by its 

 teeth was herbivorous, ])r()bal)ly livin<>; on the rank water weeds of the 

 nearly sea-lev(4 marshes of Wyoming-. Contrasted with the herbivorous 



.„ Brontosaurus, is the carnivorous dinosaur Allosaurus, 



Allosaurus ' 



mount(Hl to r(^])resentv the animal feeding;- on the fallen 

 carcass of a Brontosaurus, upon wdiich it preycMl. This is not a fanciful 

 niountino- 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 tec^th of Allosaurus as it 

 tore the flesh from its victim. 



TYRANNOSAURUS AND MAN 



A man would have been but a mouthful for ihia the latest and largest of flesh-eating dinosaur. 



Near the Allosaurus group is a portion of a skeleton of Tyrannosaurus 

 the last and most powerful of the carnivorous dinosaurs. Like Allosaurus 

 Tyranno- it has enormous three-toed hind legs, armed with sharp 



saurus claws, and smaller forelegs. Tyrannosaurus is from 



Montana 'and the matrix in which it was found is as hard as flint. 



I 



