. The Ceratopsia. Ceratopsia. Fig. 65.—Anterior view of right humerus of Triccratops prorsus Marsh, No. 4842, TJ. S. National Museum, in mounted skeleton. One-eighth natural Fig. 66.—Posterior view of right humerus of Triceratops prorsus Marsh, No. 4842, U. S. National Museum, in mounted skeleton, h, Head; r, radial crest; re, radial condyle; uc, ulnar condyle. One-eighth natural size. After Marsh. The anconeal fossa is shallow, scarcely exceeding in depth the cavity situated directly opposite on the anterior face of the humerus. The humerus is proportionally somewhat longer when compar
. The Ceratopsia. Ceratopsia. Fig. 65.—Anterior view of right humerus of Triccratops prorsus Marsh, No. 4842, TJ. S. National Museum, in mounted skeleton. One-eighth natural Fig. 66.—Posterior view of right humerus of Triceratops prorsus Marsh, No. 4842, U. S. National Museum, in mounted skeleton, h, Head; r, radial crest; re, radial condyle; uc, ulnar condyle. One-eighth natural size. After Marsh. The anconeal fossa is shallow, scarcely exceeding in depth the cavity situated directly opposite on the anterior face of the humerus. The humerus is proportionally somewhat longer when compared with the femur than are the bones of the fore arm as compared with the tibia and fibula. The general form of the humerus is well shown in figs. 65 and 66. THE ULNA. The ulna is extremely massive above, but smaller below. There is a slight constriction in the shaft a little above the distal extremity. The olecranon is massive and is produced far above the proximal end of the radius, as in most mammals, conditions differing materially from those which obtain in this element in most 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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