XV.] 



CARNIVORA. 



273 



condylar perforation in any of the Old World Simiina, nor in 

 Ateles, Mycetes or Hapale among the American Monkeys ; 

 but in the remaining genera of Cebidce, and in most of the 

 Lemurs, such a perforation is found. In the Aye-Aye 

 (Chiromys) the supinator ridge is remarkably developed. 

 The radius and ulna are distinct in all ; in the higher forms 

 (especially the Gorilla) greatly curved, leaving a large space 



u 



FIG. 87. FIG. 88. FIG. 89. 



Anterior aspect of the bones forming the right elbow-joint of Man (Fig. 87) ; of the 

 Dog (Fig. 88) ; of the Red Deer (Fig. 89) ; all 3. k humerus ; r radius ; it ulna. 



between them in the middle of the fore-arm. The power of 

 supination and pronation, which in the higher forms almost 

 equals that enjoyed by Man, is much reduced in the inferior 

 types of the order, although never entirely lost. 



In the CARNIVORA the head of the humerus has no longer 

 that hemispherical form, so well marked in the higher 

 Primates. The tuberosities are strong and rough, and 

 project upwards beyond the level of the head. The shaft 



