68 THE SKELETON OF THE CAT. 
side a wedge-shaped process, the styloid process (/), extends 
distad. The distal surface of the end together with the lateral 
surface of the styloid process form a concave articular cavity 
(g) which fits against the scapholunar bone. 
Fic. 49.—Rapius AND ULNA, Dorso- Fic. 50.—RapDIUs AND ULNA, VENTRO- 
LATERAL VIEW. MEDIAL VIEW. 
J, radius; 77, ulna. a, head of radius; 4, neck; ¢, bicipital tuberosity; 4, 
articular circumference; ¢, facet for radial fossa of humerus; /, styloid process of 
radius; g, facet for articulation of scapholunar bone; 4, semilunar (or great sigmoid) 
notch of ulna; 2, coronoid process; 7, olecranon; &, area for insertion of brachialis 
and clavobrachial muscles; /, rough area for attachment of interosseous membrane; 
m, styloid process of ulna. : 
The dorsal surface of the distal end is marked by longi- 
tudinal grooves for tendons, and its lateral or ulnar surface bears 
a concave facet for articulation with the ulna. 
Ulna (/7, Figs. 49 and 50).—The ulna is a long slender 
