. The Ceratopsia. Ceratopsia. MONOCLONIUS". 81 Monoclonius fissus Cope. 1889. Type (No. 3988, American Museum of Natural History) consists of poorly preserved pterygoid. Original description on page 717, vol. 23, Am. Naturalist, 1889. Nopcsa, F. Baron, Foldtani Kozlony, Budapest, 1901, vol. 31, p. 270. Osborn, H. F., Contr. Canadian Pal., vol. 3 (), pt. 2, 1902, pp. 14, 20. Founded on a right pterygoid mistaken by Cope for a squamosal (No. 3988, American Museum of Natural History). This bone is very incomplete. I shall only quote Cope's original description and give figures of the
. The Ceratopsia. Ceratopsia. MONOCLONIUS". 81 Monoclonius fissus Cope. 1889. Type (No. 3988, American Museum of Natural History) consists of poorly preserved pterygoid. Original description on page 717, vol. 23, Am. Naturalist, 1889. Nopcsa, F. Baron, Foldtani Kozlony, Budapest, 1901, vol. 31, p. 270. Osborn, H. F., Contr. Canadian Pal., vol. 3 (), pt. 2, 1902, pp. 14, 20. Founded on a right pterygoid mistaken by Cope for a squamosal (No. 3988, American Museum of Natural History). This bone is very incomplete. I shall only quote Cope's original description and give figures of the type, since the species is based on very insufficient and unsatisfactory material. Founded ton a squamosal bone of an individual of much smaller size than those above described \_M. crassus, recur- vicornis, and sphenocerus]. The suture with the parietals is relatively shorter than in the if. crassus, occupying only the distal third of the margin. The plate anterior to the trans- verse suture for the quadrate is more nearly in one plane, is wider in relation to its length, and has a squamosal sutural surface and a transverse groove not seen in the M. crassus. The excavation posterior to the process which joins the quadrate is deeper. External border mostly lost. Total length, 180 mm.; length in front of quadrate suture, 50 mm.; width in front of same, 87 mm.: width at postquadrate con- cavity, 62 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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