THE COLLECTION OF FOSSIL VERTEBRATES 29 



preserved. In Case 4 are limbs and other parts of several species 

 of Amphibious Dinosaurs. 



The Beaked Dinosaurs (Predentata) northeast corner of 

 the hall, had a horny beak or bill at the front of the jaw, and 

 teeth at the back of it. They were most extraordinary Beaked 

 and bizarre animals, huge in size, although not so Dinosaurs, 

 large as the Amphibious Dinosaurs. Stegosaums had ®g° saurus » 

 a series of great bony plates projecting from the back, and Had- 

 and stout bony spines on the tail. Triceratops had an rosaurus. 

 enormous skull with three great horns projecting forward, and a 

 strong bony frill projecting backward around the neck. Both 

 these were quadrupedal animals with massive limbs and elephan- 

 tine feet. Hadrosaiirus was a bipedal dinosaur with long hind 

 limbs and three-toed bird-like feet, but with hoofs instead of 

 claws. Its beak was broad and flattened, as in the spoon-bill 

 duck or Ornithorhynchus of Australia. 



The Carnivorous Dinosaurs are exhibited on the east side 

 of the hall (opposite the entrance). They were bipeds with bird- 

 like feet, sharp claws and large heads with sharp- carnivor- 

 pointed teeth. Some of these, the Megalosaurs, were ous 



of gigantic size, much larger than any modern car- Dinosaurs - 

 nivore. Allosaurus was as large as an elephant, while other 

 Megalosaurs were even larger. Other Carnivorous Dinosaurs, 

 such as Omitholestes, were small and of slender proportions; 

 these probably lived on the small animals of that period — toothed 

 birds, pterodactyls, small reptiles of various kinds — while the 

 large herbivorous dinosaurians were more probably the chief 

 prey of the Megalosaur. 



All the Dinosaurs had become extinct by the end of the Age 

 of Reptiles. Their place was taken by the more intelligent 

 and adaptable mammals, the evolution of which into the differ- 

 ent kinds of modern quadrupeds has been seen in the other Rep- 

 Hall of Fossil Mammals. tiles— 



On the south side of the Fossil Reptile Hall are Cro ^ od ; les > 

 r Turtles, 



fossil remains of four oilier groups oi reptiles, the pterodac- 

 Crocodiles, Turtles, Lizards and Snakes, which, tyis etc. 

 more fortunate than the dinosaurs, have survived to the present 

 day, though in much diminished numbers and importance. 



