i6 



THE COLLECTION OF FOSSIL VERTEBRATES 



became extinct. The Titanotheres occupy the first of the 

 three main alcoves into which the south side of the hall is 

 divided. 



The second alcove is devoted to the Rhinoceroses, which 



RESTORATION OF TITANOTHERIUM, AN EXTINCT HOOFED MAMMAL OF WESTERN AMERICA 



The picture shows a bull, a cow and a calf 



From the original water-color, based on mounted skeleton and skulls in American Museum 

 of Natural History 



were very common beasts in North America as well as in the Old 

 South World during the Tertiary period. They also began in 



Alcove 2. the Eocene as small hornless animals (Hyrachyus, Case 

 Rhinoce- y) ? but diverged in the Oligocene into cursorial, aquatic 

 and true (terrestrial) Rhinoceroses of which the two 

 former soon became extinct. True Rhinoceroses also became ex- 

 tinct in America by the Pliocene epoch, while in the Old World 

 several of them have survived to the present day. 



Third Alcove. Horses. 1 This fine exhibit is due chiefly to 



1 For more detailed information regarding the evolution of the Horse, see 

 Guide Leaflet No. 7, "The Evolution of the Horse." Published January, 1903. 



