UNQULATA. 



233 



They are 



hundred with their long, viscous tongues, 

 inhabitants of the Orient and Ethiopia. 



The ant-eaters of South America have no teeth ; the 

 muzzle is elongated like a proboscis, and by the aid of 

 the long, viscous tongue, sometimes half a yard in 

 length, they can lap up ants and termites (large white 

 ants), after they have torn down the ant-hills with their 

 powerful claws. There are several species of ant-eater. 



CHAPTER XXV. 

 Ungu lata Artiodactyla. 



THOSE mammals that have the horny extremity of 

 the feet developed into hoofs are 

 called ungulata. The order in- FIG. 165. 



eludes a great number of species ; 

 in some the number of toes is odd, 

 in others it is even, and an excel- 

 lent classification is based on this 

 difference. Those having an even 

 number of toes are called artiodac- 

 tyla, and this class includes the 

 ruminants, the hippopotami, and the 

 swine families. The ruminants are 

 distinguished by a complex stomach, 

 and comprise the deer, oxen, sheep, 

 giraffes, and camels. Those un- 

 gulates having an odd number of 

 toes and this number does not HORSE. 

 exceed five are called perissodac- 



tyla ; among these are the horse, ass, zebra, tapir, and 

 rhinoceros. The elephant has five toes, but he is the 



20* 



Ox. 



