18 
Figure 8. Cranium of Edmontosaurus, Cat. No. 2289; | 
natural size; superior ’aspect. Als, alisphenoid; F, frontal; L, 
lachrymal; N, nasal; Opot, opisthotic; P, parietal; Pof, post- 
frontal; Prf, prefrontal; Prot, prootic; Soc, supra-occipital; Sq, 
squamosal. 
