BONES OF THE THORACIC LIMB 



129 



radius; it projects below the level of the latter, formingthe styloid process (Processus 

 styloideus ulnae), which furnishes part of the facet for the ulnar carpal. The proxi- 

 mal and distal ends unite with the shaft at three and one-half to four years. 



The carpus consists of six bones, four in the upper row, and two in the lower. 

 The upper row is oblique in conformity with the carpal articular surface of the 

 radius. The radial and intermediate resemble in general those of the horse, but 



External condyle of humej^ns 

 External tuberosity of radius 



Olecranon 



Proximal interosseous space 



Shaft of ulna 



Distal end of radius 



Intermediate carpal bone 



Radial carpal bone 



Fused second and third carpal bones 



Metacarpal tuberosity 



Groov 



Distal interrosseons space 

 Styloid process of ulna 

 Accessory carpal bone 



Ulnar carpal bone 

 Fourth carpal bone 

 Small metacarpal bone 



Large metacarpal bone 



Proximal sesamoid 

 First phalanx 



Second phalanx 

 Distal sesamoid 

 Third phalanx 



Fig. 100. — Skeleton of Left Fore Limb of Ox, from Elbow Downward, External View. 



berger-Baum, Anat. fiir Kiinstler.) 



(After Ellen- 



are less regular in shape, and their long axes are directed obliquely backward and 

 inward. The radial is narrower than in the horse and curves upward behind. The 

 intermediate is constricted in its middle, and wider behind than in front. The 

 ulnar is large and very irregular. Its proximal surface is extensive and sinuous and 

 articulates with both radius and ulna. Behind is a large oval facet for articulation 

 with the accessory carpal. The accessory is short, thick, and rounded; it articu- 

 9 



