. The Ceratopsia. Ceratopsia. Fig. 72.—Fibula of Tri- ceratops serratus, No. 970, American Muse- um of Natural His- tory, anterior view. One - eighth natural size. Drawn by R. S. Lull. Fig. 73.—a, b, c, External, posterior, and internal views of metatarsal of Triceratops prorsus, U. S. National Museum, d, , Dorsal, lateral, and palmar views of ungual phalanx of the pes of Triceratops horridus, U. S. National Museum. All one-eighth natural size. After Marsh. THE PHALANGES. The phalanges of the pes are very similar to those of digits II, III, and IV in the manus, though somewhat larger. The p
. The Ceratopsia. Ceratopsia. Fig. 72.—Fibula of Tri- ceratops serratus, No. 970, American Muse- um of Natural His- tory, anterior view. One - eighth natural size. Drawn by R. S. Lull. Fig. 73.—a, b, c, External, posterior, and internal views of metatarsal of Triceratops prorsus, U. S. National Museum, d, , Dorsal, lateral, and palmar views of ungual phalanx of the pes of Triceratops horridus, U. S. National Museum. All one-eighth natural size. After Marsh. THE PHALANGES. The phalanges of the pes are very similar to those of digits II, III, and IV in the manus, though somewhat larger. The proximal phalanges are rather long, but the intermediate ones are very short and broad. The terminal phalanges are broad and rugose or cancellous. They were incased in flat hoofs instead of compressed claws as in the sauropod and theropod dinosaurs. It is probable that the third digit was provided with four or five phalanges, while the second and fourth digits would each have had one less than the 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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