130 



TITANOTHERES OF ANCIENT WYOMING, DAKOTA, AND NEBRASKA 



(Cervus), mountain caribou (Rangij'er) , at elevations 

 of 2,000 to 8,000 feet. On these levels in South 

 America are found among the Tapiridae T. {Elasmo- 

 gnathus) bairdi, a hill dweller seeking the lowlands 



during the rainy season ; also T. (ElasmognatTius) dowi. 

 In the equatorial belt of Africa both the high forests 

 and lower forested foothills favorable to the growth 

 of shrubs and trees attract also the elephants. 



Vertical distribution qf lije zones oj ungulates 



