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Explanation of Plate I. 
Eoceratops canadensis Lambe; side view of skull. Type; one-ninth natural 
size. In advance of the supraorbital horn-core are shown outlines 
of its cross section, the larger above the base, the other near the top. 
Abbreviations — A , fontanelle of frill ; AN, angular; D, lateral temporal fossa; 
DN, dentary; E, epinasal; J, jugal; L, lachrymal; MX, maxilla; 
N, nasal; NO, nasal opening; OR, orbit; P, parietal; PDN, pre- 
dentary; PF , prefrontal; PM, premaxilla; PTF, postfrontal; 
Q, quadrate; QJ, quadratojugal; R, rostral; S, squamosal; 5i4, 
surangular. 
