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Rough drawing to show scale of size of Tyrannosaurus rex. This carnivorous dinosaur 
was the largest beast of prey that ever lived. The Museum possesses one Tyrannosaurus 
skeleton from South Dakota and two from Montana 
SOUTHEAST PAVILION 
Fosstt REPTILES AND FISHES 
The visitor now enters the Southeast Pavilion containing the dinosaurs 
and other fossil reptiles and also fishes. These animals belong to a more 
ancient period than the specimens just examined. They lived from 
| 3,000,000 to 10,000,000 years ago. They include the 
The well-known dinosaurs of which the Museum has a large 
Becks collection. In the wall case on the left is a portion of the 
skeleton of the dinosaur Diplodocus; this was the first of 
these specimens to be unearthed by the Museum. 
The gigantic skeleton in the center of the hall is the huge extinct reptile, 
the dinosaur Brontosaurus, found in the Jurassic beds of 
Wyeming. It is the only mounted specimen of its kind in 
the world and more than two-thirds of the skeleton is the original petrified 
bone. It is sixty-six feet eight inches in length, sixteen feet in height and 
is estimated to have weighed when alive thirty-five tons. Brontosaurus is 
one of the largest giant reptiles and as is indicated by its teeth was her- 
biverous, probably living on the rank water weeds of the nearly sea-level 
marshes of Wyoming. Contrasted with the herbivorous Brontosaurus, is 
the carnivorous dinosaur Allosaurus, mounted to represent 
the animal feeding on the fallen carcass of a Brontosaurus, 
upon which it preyed. 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 cf 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 Tyrannosaurus 
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Brontosaurus 
Allosaurus 
