THOEACIC LIMBS 



635 



The dorsal surface of the base (Fig. 504) is convex from side to 

 side, slightly roughened, and passes into the corresponding surface of 

 the shaft. 



FIG. 504. 



Proximal End. 



With I'ncijonn 

 With Fourth 



Radial Side. 



Tuberoxity. 



I 'I nar Side. 



FIFTH LEFT MET-ACARPAL, DORSAL SURFACE OF BASE AND 



PART OF SHAFT. 



The palmar surface (Fig. 505) consists of the hook-like extension 

 of the proximal surface, and an inferior rough space which is continu- 

 ous with the back of the shaft. 



FIG. 505. 



Proximal End. 



Tuberosity. 



Ulnar Side. 



With Unciform. 



Radial Side. 



FIFTH LEFT METACARPAL, PALMAR SURFACE OF BASE AND 



PART OF SHAFT. 



The ulnar surface (Fig. 506) is convex in both directions ; it forms 

 a rounded tuberosity, which is rough for the attachment of ligaments 

 and the extensor carpi ulnaris muscle. 



FIG. 50H. 

 Proximal End. 



J'n/inar Side. 



FIFTH LEFT METACARPAL, ULNAR SURFACE OF BASE AND 

 PART OF SHAFT. 



On the Shaft of the fifth rnetacarpal the dorsal surface faces to 

 the ulnar side as well as forward. The palmar aspect gives origin 



