PLATE XXIII. 



ELEMENTS OF POSTERIOR CREST OF TYPE OF CERATOPS CANADENSIS 



LAMBE. 



After the original by Lambe. 

 (See p. 94.) 



Specimen No. 1254, Canadian Geological Survey collection. 

 Fig. 1. Superior view of right squamosal. 

 Fig. 2. Inferior view. 



Fig. 3. Upper surface of front end of right lateral posterior extension of parietal. 

 Fig. 4. Lower surface. 



c, Pit for process of quadrate; d, surface for articulation with exoccipital; e, surface for contact 



with jugal. 

 One-sixth natural size. 



244 



