242 



EXTINCT MONSTERS 



and part of a fifth. It had a wide range in America and Europe. 

 The next stage is seen in the Hyracotherium (see Fig. 88), also 



o 



known as Protorohippus. Its skull and forefoot are shown in 

 Fig. 89. A nearly complete specimen was found by Dr. J. L. 

 Wortman in the Big Horn Mountains of North Wyoming. It 



