94 



THE CAT. 



[CHA?. IV. 



and concave above for articulation with the capitellum of the 

 humerus. 



At its lower end the radius becomes much broadened out, and its 

 anterior or extensor * surface is grooved for the passage of tendons. 



D 



B; 



Fig. 55. THE RIGHT RADIUS. 



A. Anterior and outer aspect. 



B. Posterior and inner aspect. 



C. Distal articular surface for wrist. 



D. Proximal surface for humerus. 



It. Head. 



s. Styloid process. 



t. Tuberosity. 



u. Surface for ulna. 



Its outer side is prolonged into what is called the styloid 

 process (s). The lower end of the bone articulates with the wrist 

 by a large concave surface supporting the fore-paw, which is carried 



* Called "extensor" because the muscles which stretch the toes are attached 

 to this surface. 



