500 



ZOOLOGY 



SECT. 



The Aard-varks (Orycteropus, Fig. 1116) have a thick-set body, 

 the head produced into a long muzzle with a small tubular mouth, 



Fio. 1116. Aard-vark (Orycteropus capensis). (After Vogt and Specht.) 



the pinna? of great length, the tail long and thick. The fore-limbs 

 are short and stout, with four toes, the palmar surfaces of which 

 are placed on the ground in walking. The hind-limb is five-toed. 

 The surface is covered by a thick skin with sparse hairs. 



FIG. 1117. Killer (Orca gladiator). (After True.) 



The Cetacea (Fig. 1117), among which are the largest of 

 existing Mammals some reaching a length of 80 or 90 feet are 



