178 THE STRUCTURE OF THE HOESE 



the toes resting on bare cushions or pads placed beneath 

 the joint between the middle and ungual phalanx. 



Fig. 24. — Section of the finger of man. 1, metacarpal 

 bone ; 2, first phalanx ; 3, second phalanx ; 4, third or 

 ungual phalanx ; 7, tendon of extensor muscle ; 8, ten- 

 don of superficial flexor (flexor per forattis); 9, tendon 

 of deep flexor ( flexor perforans) ; 11 and 14, derm or 

 true skin ; 15, nail ; 17, fibro-fatty cushion of end of 

 finger; 18, ditto of palm behind metacarpo-phalangeal 

 joint ; 19, thickened epidermal covering of the same. The 

 corresponding parts of figs. 24 and 25 have the same 

 numbers. 



When the horny covering of the last phalanx is 

 modified into a hoof, on which the animal habitually 



