24 
Plate I 
Corythosaurus excavatus Gilmore. Plesiotype No. 8676, Geol. Surv., Canada, \ 
natural size. 
Figure 1. Disarticulated hood showing internal view of right premaxilla and nasal 
and external view of left premaxilla with part of narial passage exposed. L. N left 
nasal (misplaced), N. nasal, Nar. P. narial passage, Pmx. premaxilla, Fmx, 1 tip of lower 
limb of premaxilla. (Negative No. 77068.) 
Figure 2. Mounted skull and jaws. D. dentary, J. jugal, Mx. maxilla, Pal. 
palatine, Pd. predentary, Po. postorbital, Frf. prefrontal, Pt. pterygoid, P.V. prevomer, 
Q. quadrate, Sq. squamosal, Sur. surangular. (Negative No. 77939.) 
