220 THE WORLD OF LIFE CHAP. 



obtained from our London Clay. It had a heavy body, 

 five -toed stumpy feet, and a complete set of 22 teeth 

 in each jaw adapted for a vegetable diet ; but no defensive 

 tusks or horns. Other allied species were much smaller, 

 and all were remarkable for a very small brain. 



But a little later, in the Middle Eocene of North 

 America, they developed into the most wonderful monsters 

 that have ever lived upon the earth the Dinocerata or 



FlG. 73. UlNTATHERIUM INGBNS. 

 Eocene of Wyoming, U.S.A. One-thirtieth nat. size. (B.M. Guide.) 



" terrible-horned " beasts. These had greatly increased in 

 size ; they often had large tusks in the upper jaw ; and horns 

 of varied forms and sizes were developed on their heads. 

 The tusks were sometimes protected by a bony flange pro- 

 jecting downwards from the lower jaw immediately behind 

 it, as well shown in the figure here given of Uintatherium 

 ingens. This animal must have been about 1 1 feet long 

 and nearly 7 feet high ; and if the six protuberances of the 

 skull carried horns like our rhinoceroses, it must, indeed, 

 have been a " terrible " beast. The imperfect skull of 

 another species (Fig. 74) shows even larger the bony horn- 

 cores presenting all the appearance of having carried some 



