MAMMALS 411 



(the name means "river horse"), now 

 found in Africa, but formerly extend- 

 ing to Europe and Asia. 



(iv) Camelidce. Camels, found in Central Asia 

 and North Africa ; and llamas, found in 

 South America. This discontinuous dis- 

 tribution of the family would be aston- 

 ishing, did we not know from fossils 

 that camels of many genera formerly 

 abounded in North America. 



(v) Giraffidce. Giraffes and the okapi (Ocapia), 

 now confined to Africa. 



(vi) Cervida. Deer, including the reindeer, 



caribou, and moose. The name elk 



(Alces) properly belongs to the moose, 



and is wrongly applied to the American 



.wapiti, which is a close relative of the 



Photograph by S. S. Flower 



FIG. 189. Hippopotamus (Hippopotamus amphibius) in the 

 Giza Zoological Gardens, Egypt. 



