XXXII 



THE HIPPOPOTAMUS 



407 



been informed that the natives in some of the Polynesian 

 islands remove the upper tusks of the boars in order 

 that the lower tusks, lacking antagonists, shall grow in 

 a circular manner and become valuable as charms. 



The hippopotamus uses its canines and incisors 

 like an agricultural spud for rooting up the grass 



The skull of a hippopotamus with the jaws opened 

 to display the teeth. 



and aquatic plants on which it feeds ; also for righting 

 enemies and rival bulls. Hippopotamuses are apt to 

 be quarrelsome, and travellers as well as sportsmen 

 mention that the hides of the cows, as well as those 

 of the bulls, are often well-scarred. 



When hunted or wounded, a hippopotamus will 



