. The Ceratopsia. Ceratopsia. 94 THE Red Deer River, Alberta, between Berry Creek and Dead Lodge Canyon. Lambe's original description is as follows: This species is founded on a squamosal, part of a parietal, a jugal, a supraorbital horn core, the left ramus of the lower jaw, and an anterior dorsal vertebra, with some other parts of the skull, not yet fully determined, of one individual. A right ramus of another individual is shown on PI. XVIII [XIX] and a separate horn core on PI. XVII [XVIII]. A right mandibular ramus, referred to this species on account of its resemblance in fo
. The Ceratopsia. Ceratopsia. 94 THE Red Deer River, Alberta, between Berry Creek and Dead Lodge Canyon. Lambe's original description is as follows: This species is founded on a squamosal, part of a parietal, a jugal, a supraorbital horn core, the left ramus of the lower jaw, and an anterior dorsal vertebra, with some other parts of the skull, not yet fully determined, of one individual. A right ramus of another individual is shown on PI. XVIII [XIX] and a separate horn core on PI. XVII [XVIII]. A right mandibular ramus, referred to this species on account of its resemblance in form to the one shown above, is described further on. The horn core (fig. 18 [fig. 96, PI. XVIII]) rises above the orbit from the postfrontal, of which it forms a part. The postfrontal unites behind, by suture, with the squamosal and below with the jugal. The orbit is oval, with the longer diam- eter vertical, its upper curve lying close under the base of the horn core, its margins not ridged. The horn core is small, about centimeters long from the upper edge of the orbit to its summit and centimeters in circumference near the base, P--V ,\ circular in section, and solid. Squamosal [PI. XXIII], somewhat triangular in shape, flat, moderately thin, its outer edge smooth, rounded, wavy in out- â '-h. line, so as to produce six minor convex curves. Shorter and more pronounced near the front. Its outer front edge is deeply emarginated, with a shallower concavity limiting the outer ter- mination of the jugal suture (see fig. 18 [fig. 96]), inside of which is the suture for the union with the postfrontal. The inner bor- der is slightly concave. The lower surface near and parallel to the inner posterior end is broadly and shallowly grooved for the reception of a long, slender bone, triangular in section, that Z"V I projects backward and inward, its outer edge continuing the curve of the squamosal. Probably this slender bone represents Fig. 96.â Monoclonius canadensis; pa
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