BONES OF THE THORACIC LIMB 



129 



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

 styloitleus ulnse), 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 humerns 

 External tuberosity of radius 



Olecranon 



Proximal interosseous space 



'Shaft (f ulna 



Groove 



Distal end of radius 



Intermediate carpal hone 



Radial carped bone 



Fused second and third carpal bones 



Melacarpcd t uberosity 



Dit^I'd inferrosseous space 

 Sly/did /)/-ncr.ss of ulna 

 iccessory carpal bone 



Inar carpal bone 

 Fourth carpal bone 

 Small metacarped bone 



Large metacarpal bone 



Proximal sesamoid 

 First phaleinx 



Second phalanx 

 Distal s( so moid 

 Third pJudanx 



Fig. 100. — Skeleton of Left Fore LiMn of Ox, i hom Ei.now Downward, External View. (After Ellen- 



berger-Bauin, Aiiat. fiir Ktinstler.) 



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 wdder 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 



