616 MAMMALIAN ANATOMY 



are emarginate, and the palmar border is prolonged above and below 

 by the two small prominences of the palmar surface. From a point 

 dorsal to the centre back to the palmar border a large part of the radial 

 surface is taken up with a rough depression wherein is attached the 

 ligament from the magnum. Dorsal and distal to this pit is the L- 



FIG. 481. 

 Proximal Side. 



. With Magnum. 



Palmar Side. J^^f^T' Dorsal Side. 



With Fourth Metacarpal. With Third Metacarpal. 



Distal Side. 



LEFT UNCIFORM, RADIAL SURFACE. 



shaped articular surface for the magnum. The articular facet on the 

 proximal surface for the scapho-lunar is visible along the proximal 

 border, slightly in the dorsal half, but more largely on the palmar half. 

 The ulnar surface (Fig. 482) resembles the radial in shape. It 

 differs from it in having the dorsal half covered with cartilage and 



FIG. 482. 

 Proximal Side. 



With Scapho-lunar. 



Dorsal Side. With M ' orm - -f Jtf Palmar Side. 



With Fifth Metacarpal. 



Distal Side. 



LEFT UNCIFORM, ULNAR SURFACE. 



converted into a broad pear-shaped articular facet for the cuneiform. 

 It is slightly concave from above downward and convex from before 

 backward. The palmar half of the ulnar surface is rough and de- 

 pressed for the attachment of the strong ligament from the palmar 

 border of the radial surface of the cuneiform. The palmar border is 

 swollen at each end. 



The proximal surface (Fig. 483) is long and narrow and lies 

 obliquely to the dorso-palmar axis of the bone, because it is directed 

 from the dorsal to the radial as well as to the palmar side. It faces 



