626 



MAMMALIAN ANATOMY 



FIG. 492. 



Proximal End. 



- With Trapezium. 



Palmar Side. 



Dorsal /Side. 



SECOND LEFT METACARPAL, RADIAL SURFACE OF BASE AND 



PART OF SHAFT. 



The palmar angle of the base (Fig. 493) is a prominent hook-like 

 process for the attachment of the first palmar interosseous muscle. 



FIG. 493. 



Proximal End. 



Wit h Trapezoid. 



Palmar Hook, 



Ulnar Side. 



With Trapezium. 



Sirclling in front nj 

 ivhich, is inserted 

 Zfemfcmo/ EXTENSOR Radial Side. 



CARPI RADIALIS LON- 



SECOND LEFT METACARPAL, PALMAR SURFACE OF BASE AND 



PART OF SHAFT. 



The proximal border of the ulnar surface of the base (Fig. 494) 

 appears as a ridge, which overhangs the surface lying below. The 



Fio. 494. 

 Proximal End. 



With Trapezoid. 



With Magnum. 

 With Third Metacarpal. 



Dorsal Side. 



Palmar Hook. 



Palmar Side. 



SECOND LEFT METACARPAL, ULNAR SURFACE OF BASE AND 



PART OF SHAFT. 



ridge is sharp in front and prominent and rounded behind. Between 

 these two parts is a roughened pit for the insertion of the ligament 

 which binds the bone to the magnum. The ridge extends over the 



