6 
Figure 3. Skull of type of Edmontosaurus, Cat. No. 2288; left lateral aspect; | natural size. Als, alisphenoid; Ar, articular; Z)n, 
dentpy; F, frontal; J, jugal; L, lachrymal; Itf, lateral temporal fenestra; Mx, maxillary; N, nasal; no, nasal opening; Opot, opis- 
thotic (paroccipital process); Orb, orbit; P, parietal; Pal, palatine; Pmx, premaxillary; Pof, postfrontal; Prd, predentary; Prf, 
prefrontal; Prot, probtic; Pt, pterygoid; Q, quadrate; Qj, quadrato-jugal; Sa, surangular; Soc, supra-occipital; Sp, splenial; Sq, 
squamosal; stf, supratemporal fenestra; V, vomer. II, III IV, exits of cranial nerves. 
