SKELETON OF LOWER LIMB. 



209 



It may, however, coalesce with the naviculare, as in the Ox 

 and Deer. 



It may unite with the fourth and fifth metatarsals, as in 

 the Chameleo and Bradypus. 



19. The distinctness of the METATARSUS and the develop- 

 ment which this segment of the limb attains in man are 



FIG. 178. SKELETON OF RIGHT PEL- 

 VIC LIMB OF HORSE. 



a, astragalus : c, calcaneum ; cu, cu- 

 boides ; ec, ecto-cuneiforme ; f, fe- 

 . mur ; gt, great trpchanter ; m^ t meta- 

 tarsal of third digit ; m*, rudimentary 

 fourth metatarsal ; n, naviculare ; pa t 

 patella ; /S/ 2 , and/ 3 , first, second, 

 and third phalanges of the third and 

 only digit ; s, sesanioid ; t, tibia ; 

 t 3 , third trochanter. 



lie. 179. RIGHT PELVIC LIMB .OF 

 GIRAFFE. 



a, astragalus ; c, calcaneum ; cu, cu- 

 boides ; d$, proximal phalanx of 

 third digit ; d*, proximal phalanx of 

 fourth digit ;/", femur ; /"', rudiment 

 of fibula (the line is not continued 

 far enough the rudimentary fibula 

 is a small ossicle reposing on the 

 upper surface of the calcaneum, as 

 shown in the figure); #z 3 * 4 , meta- - 

 tarsals of digits 3 and 4 united into 

 one "cannon-bone"; pa, patella; 

 t, tibia. 



characters which are normal in man's class, and more or 

 less so in that of Reptiles. The metatarsus may be of much 

 greater relative length than in man, as is the case in the 

 Ungulata. 



p 



