402 



MAMMALIA 



factory human food. The one-humped Arabian camel Is very speedy. 

 The two-humped Bactnan is short legged, and long haired. It is 

 especially important in the heat and cold encountered in Mongolia. 

 Camels were introduced to the United States in 1850 at the Gold 

 Rush and later purchased for use in the Union Army. The llama 

 is a Peruvian beast of burden. In Peru, Chile, and South Africa, 



Moose 



Fig. 228. A, Virginia deer. 5, moose. C, elk. (From L. A. Fuertes. Courtesy of 



Slingerland-Comstock Publishing Co.) 



the alpaca {el paco)^ a somewhat smaller form, is bred for its valuable 

 long hair. 



The deer family ( Cervidae) are differentiated from the other 

 ruminants by the presence of bony antlers. The male deer of most 

 species have solid horns which are shed once a year, close to the 

 skull, and are fully renewed by rapidly growing out in a soft state 



