Plate II. Stegoceras validus; Cat. No. 138; superior aspect; natural size. 



Abbreviations. — F, frontal; n, suturai facet for nasal; P, parietal; Pof, post- 

 frontal; ,Por, postorbital; prf, suturai facet for prefrontal; sor, suturai 

 facet for supra-orbital; Sq, squamosal; stj, supratemporal fossa. 



