556 



ZOOLOGY 



SECT. 



in the higher forms the shafts of the two bones are bent outwards, 

 so that there is a wide interosseous space, and there is consider- 



FlG. 1178.— Skeleton of Omns (.Simla sati/rus). (After Blaiuville.) 



able freedom of movement in pronation and supination. In the 

 carpus (Fig. 1179) the scaphoid and lunar are always distinct, and a 

 centrale is present in ail except some of 

 the Lemurs, the Gorilla, Chimpanzee, and 

 Man. A pisiform is present, and in most 

 a radial sesamoid. As compared with 

 tliat of the other Primates, the carpus of 

 Man is short and broad ; the trapezium 

 has a saddle-shaped articular surface 

 turned somewhat inwards. In Man, the 

 Chimpanzee, Gorilla, and Orang, the 

 carpus articulates exclusively with the 

 radius ; in all the others it articulates 

 also with the ulna. In Man the poUex 

 has a remarkable and characteristic free- 

 dom of movement in opposition to the 

 other digits. 



The human pelvis is remarkable for its Relative breadth, for 

 the expanded form of the ilia and the deep concavity of their 



Fin. 1170.— Carpus of Baboon 

 (Cyyiocejihalus aiiubis). ce. cen- 

 trale ; c. cuneiform ; /. lunare; 

 m. magnum ; p. pisiform ; r.s. 

 radial sesamoid ; s. scaplioid ; 

 td. trapezoid ; tvi. trapezium ; 

 w. unciform, (After Flower. ) 



