500 



ZOOLOGY 



SEOT. 



The Aard-varks {Orycinopns, Fig. 1110) have a tliick-sct body, 

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



Fi(i. inc. — Aard-vark (Oyi/cfernpnx capens!s). (After Yogt and Siiecht.) 



the pinnsTO of great length, the tail long and thick. The forc-liinbs 

 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. 



Fio. 1 1 17.— Killer (Oreo gladiator). (After True.) 



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

 existing Mammals — some reaching a lenoth of 80 or 90 feet — are 



