. The Ceratopsia. Ceratopsia. Fig. 91.—A, Lateral view of nasal horn and beak of Monoclonius sphenocerus Cope, type, No. 3989, American Museum of Natural History; B, front view of same; C, posterior view of same, h, Nasal horn core; n, nasals; fn, fronto-nasal suture; pmx, premaxillary. AH one- eighth natural size. a large heart-shaped foramen. The anterior extremities of both the nasals and premaxillary are wanting in the present specimen. Principal measurements of the type (No. 3989). Mm. Estimated total length of nasals 505 Greatest length of nasal horn core 302 Transverse diameter of horn
. The Ceratopsia. Ceratopsia. Fig. 91.—A, Lateral view of nasal horn and beak of Monoclonius sphenocerus Cope, type, No. 3989, American Museum of Natural History; B, front view of same; C, posterior view of same, h, Nasal horn core; n, nasals; fn, fronto-nasal suture; pmx, premaxillary. AH one- eighth natural size. a large heart-shaped foramen. The anterior extremities of both the nasals and premaxillary are wanting in the present specimen. Principal measurements of the type (No. 3989). Mm. Estimated total length of nasals 505 Greatest length of nasal horn core 302 Transverse diameter of horn core at base 80 Antero-posterior diameter of .horn core at base - 160 Height of apex of horn above premaxillary suture 465 GENERA AND SPECIES OF CERATOPSIA FROM THE JUDITH RIVER BEDS OF CANADA, DESCRIBED BY LAMBE. Having concluded this review of the different species of Monoclonius that have been proposed by Cope upon remains of these dinosaurs from the Judith River beds of northern Montana, I will next consider the forms described by Prof. H. F. Osborn and Mr. Lawrence M. Lambe and based, for the most part at least, on material collected by the latter in the Belly River beds of the Northwest Territory, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hatcher, J. B. (John Bell), 1861-1904; Lull, Richard Swann, 1867-1957; Osborn, Henry Fairfield, 1857-1935; Marsh, Othniel Charles, 1831-1899. Washington, Govt. Print. Off.
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