12 



MAMMALS 



fication of the foot, the digits numbering two, each bearing 

 a hoof (Fig. 3). 



Nearly all the mammals have teeth, to grind or tear 

 their food (Fig. 4), those of the chimpanzee to some extent 



resembling those of man. 



Fig. 3. — a, Fore Leg of Ox {Dos 

 taurus). B, HiND Leg of Stag 

 ( Cervus elaphus) . 



£:a, carpus; ta, tarsus; c, "canon bone," 

 composed of the united metacarpals 

 or metatarsals of the third and fourth 

 digits. 



Fig. 4. — Teeth of the Right 

 Side of the Lower Jaw of the 

 Chimpanzee (ai-ter Owen). 



i, incisors; c, canine tooth; pm, prae- 

 molars; in, molars. 



The teeth of the elephant 

 (Fig. 5) are enormous. In 

 all mammals they have 

 sockets. Perhaps the most 

 remarkable development 



