PLATE CCVII 



Left Ulna of the Type of Brontops robustus Mersh 



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



1, Medial or inner view; 2, anterior view; 3, posterior view, c, Anconaeal process; h, great sigmoid cavity; o, olecranon; p, facet 

 for cuneiform (pyramidal) ; ps, facet for pisiform. 2a, Distal end. The principal muscle attachments of the ulna are given 

 on page 716. 



