556 



ZOOLOGY 



SECT. 



-ill the liiglicr forms the shafts of the two bones are bent outwards, 

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



Fk;. 1178.— Skeleton of Ora.ns (Simia satyrus). (After Blainvillc.) 



able freedom of movement in pronation and supination. In the 

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



centrale is present in all except some of 

 the Lemurs, the Gorilla, Chimpanzee, and 

 Man. A pisiform is present, and in most 

 a radial sesamoid. As compared witli 

 that 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 pollex 

 has a remarkable and characteristic i'ree- 

 dum of movement in opposition to the 

 other digits. 



The human ^^c/vis is remarkable for its relative breadth, for 

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



W - "ML 



Fio. llTl'.— C'aii)iis of Baboon 



(Ci/noce/ihalus <(.iiahix). r, . tl-h- 

 trale ; c. cuiieifoi'iii ; /. luiiurc; 

 m. uiagiiuiii ; y. ]iisifonii ; r.x. 

 radial sesamoid ; s. .scaiilioid; 

 ttl. trapezoid ; Im. traixziuiii ; 

 u. unciform. (After Flower.) 



