PLATE CCIII 



Fourth Rib of the Type op Brontops robustus Marsh 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. (See p. 667)) 



1, Outer view; 2, anterior view; 3, inner view; 3a, inner view; 4, posterior view; 5, superior view of upper portion, h, Head of rib; 

 i, tubercle of rib. 



