MAMMALIA. 



311 



nutbing sijecial ; and tlie radius and ulna are usually present in the 

 f(ire-arm, though they may be fused with one another, or the ulna 

 may be wanting. 



w 





Fig. 222.— A, Foi-e-leg of Ox (Dos taunts). B, 

 Iliml-leg of Stag (Ceri')is daplius). ca, Carpus; 

 ta Tar.sus ; c " Canon -bone," composed of tlie 

 united metacarpals or metatarsals of the third 

 and fourtli digits. 



Pig. 223.— Fore-leg of Horse. 

 ca Carjius ; vi Metaearpal 

 of the third digit; 5 "Splint- 

 bone," or rudimentary met- 

 acarpal ; 1, First phalanx 

 or "great pastern"; 2, 

 Second jihalanx or "small 

 ]iasteni"; 3 Third phalanx 

 or " cntfin-ljone. ' 



The fore-arm is succeeded by the small boties ^\hich comjiose the 

 wrist or " carpus." These are eight in numljer in Man, but vary in 

 different Mammals from five to eleven. 



The metacarpus in Man and in most Mammals consists of five 



