I 



PLATE CCXIII 



Third Left Metacarpal of the Type of Brontops robustus Marsh 



Plate prepared under the direction of Professor Marsh. One-half natural size. (See p. 668) 



1, Anterior view; la, section at point indicated by dotted line; 2, medial or inner view (radial side); 2a, outline of section at point 

 indicated by dotted line; 3, posterior view; 4, lateral or outer view (ulnar side); 5, proximal end; 6, distal end. m, Facet 

 for articulation with magnum; mcll, facet for articulation with second metacarpal; mcIV, facet for articulation with fourth 

 metacarpal; ph, facet for articulation with first phalanx; s, facet for articulation with sesamoid; un, facet for articulation 

 with unciform. The principal ligamentous and muscular attachments of these elements are given on pages 716, 717. 



