28 



Arabian Camel or Dromedary. 



From D. Appleton ft Co.'s *' Elements of Zoology, Science Series." 



The Old World camels are well known. Two distinct 

 species are represented ; by the Bac'TRIAN Camel with its 

 two humps and long, silky hair, from which the valuable 

 shawls are made, and by the DROMEDARY, or ONE- 

 Humi-ED CAMEL of the desert. In South America, the 

 camels are small, four species being known; two of them 

 are domesticated and serve as beasts of burden. The 

 LLAMA ( Vicuna guanaco) is the more familiar form. Many 

 extinct fossil American species are recognized. 



GROUP 24.— Family Tragulida, the ChevrotIANS. 

 This is a group of small hornless, deer-like animals, resem- 

 bling antelopes. Sonic have tusks in their upper jaws pointing 

 downward. Two genera with six species are known. The 

 Musk DEER is the largest of the group. Several species 

 are about the size of a rabbit, but they stand on long, 

 slender legs. 



GROUP 25.— Family Cervidce, the Deer. This im- 

 portant and extensive group is represented in the American 



