84 



Hksferornis, vShufkuvt 



12 



Explanation ov PIate 2 (14 



Basal view of the skull of the Ostrich ( Struthio camelus) ; ^ nat. size. By 

 the author, from specimen No. 16,629, Coll. U. S. National Museum. 

 Btp, basipterygoid ; Qu, quadrate ; qj\ quadrato-jugal ; Pi, pterygoid : 

 7, jugal ; PI, palatine ; R, rostrum ; v, vomer; Mx, maxillary; Mxp, 

 maxillo-palatine ; Pntx, premaxillary. 



