"voex. 



/ outer 



at/fir 



anftnar 



J 



groovr 



Li rrL. 



tufrr 



oufrr 



burn 



FIG. 91. Bases of the four inner metacarpals of left side. Outer, inner, hack, and front views are given of 

 each bone. The cartilage-covered articular surfaces are coloured blue, a, surface for trapezoid ; 

 b, facet for trapezium ; c, insertion of Kxtens. C. radialis : d, surface for middle metacarpal ; e, surface 

 for os. magnum ; /, insertion of Fl. C. rad. and anterior ligaments ; g, surface for os magnum ; h, sur- 

 face for index metacarpal ; j, surface for fourth metacarpal ; A-, insertion of Ext. C. rad. brev. ; /, sur- 

 face for unciform ; m, surface for os magnum ; , surface for middle metacarpal ; o, surface for fifth 

 metacarpal ; />, surface for unciform ; r, surface for fourth metacarpal ; s. insertion of Ext. carpi 

 nlnaris. 



