OF THE CLASS MAMMALIA. 283 



rnidable. Courageous in defence, he seldom attacks. By 

 nature he is gregarious, living in troops, varying from fifty 

 to one hundred, and is seldom seen solitary. The oldest 

 leads the troop, and the next in age brings up the rear. 



Taken when young, they are readily trained to carry enor- 

 mous weights ; 2000 pounds weight is the load of the adult, 

 and they will perform with this a march of fifteen or twenty 

 leagues. They swim well, and live to nearly two hundred 

 years. 



Fig. 249.* 



Two species of elephants have been described, 1, the 

 Asiatic ; and 2, the African. The first is known by its elon- 

 gated head, concave forehead, and comparatively small ears ; 

 four nails on the hinder toes ; the molar teeth also present 

 parallel ridges, nearly equidistant. The tusks often remain 

 short. 2. The African species (Fig. 207), remarkable for the 



* Equus Burchellii a species of Zebra discovered by Mr. Burchell; 

 attempts are now being made to domesticate the Daauw. 



