488 



ZOOLOGY 



SECT. 



the Pigs in most of the features mentioned, the points of the upper 

 tusks are directed downwards. 



In the Hippopotami (Fig. 1129) the body is of great bulk, 



FIG. 1129. Hippopotamus (Hippopotamus amphibius). (From the Cambridge Natural 



History.) 



FIG. 1130. Burchell's Zebra (Equus burchelli). (From the Cambridge Natural History.) 



the limbs very short and thick, the head enormous, with a trans- 

 versely expanded snout, prominent eyes, and small pinnae. The 

 tail is short and laterally compressed. The toes are four in each 



