THE FOURTH CARPAL BONE 97 
and a lateral one for the fourth or lateral metacarpal bone. The medial surface 
has two or three facets for articulation with the third carpal, between which it is 
excavated and rough. The dorsal surface is convex and rough. ‘The lateral sur- 
MelV 
Mcll 
Meclll 
Fie. 73.—Lrrr Carpus oF Horse, with Parts oF ADJACENT Bones; VoOLAR VIEW. 
The accessory and first carpal bones have been moved out of their natural position and their articular connections 
indicated by arrows. Cr, Radial carpal; 3, intermediate carpal; Cu, ulnar carpal; Ca, accessory carpal; C1, first 
carpal; C2, second carpal; 4, third carpal; C4, fourth carpal; 1, groove for lateral extensor tendon; 2, tuberosity 
of radius for medial ligament of carpal joint; 5, volar tubercle of fourth carpal; 6, rough area on large metacarpal 
bone for attachment of suspensory ligament. 
Intermediate 
Third 
Fourth 
Second 
First 
Fic. 74.—Proxmat Row or Lerr Carpus or Horse; Fie. 75.—Distat Row or Lerr Carpus or Horse: 
Proxima View. 
PROXIMAL VIEW. 
144, Articular facets corresponding with those on Fig. 69; 1, Articulation of first carpal with second; 2, 2’, 
5, groove for tendon of ulnaris lateralis. facets for radial; 3, 3’, facets for intermediate; 4, 
we facet for ulnar. 
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