. Bulletin - United States National Museum. Science. Fig. 29.—Median caudal vertebra of Antrodemus valens Leidv. No. 8367, J size. Viewed from the LEFT SIDE. S, SPINOUS PROCESS; Z, ANTERIOR ZYGAPOPHYSIS; Z', POSTERIOR ZVGAPOPHYSIS. In all probability it would have entirely disappeared on the second or third vertebrae posterior to this one. Concurrent with the reduction of the transverse processes there is a great enlargement and jDro- longation of the anterior zyga- pophyses, as shown in iigures 29 and 30. These zygapophyses havewide expanding endswhich stand high above the cent
. Bulletin - United States National Museum. Science. Fig. 29.—Median caudal vertebra of Antrodemus valens Leidv. No. 8367, J size. Viewed from the LEFT SIDE. S, SPINOUS PROCESS; Z, ANTERIOR ZYGAPOPHYSIS; Z', POSTERIOR ZVGAPOPHYSIS. In all probability it would have entirely disappeared on the second or third vertebrae posterior to this one. Concurrent with the reduction of the transverse processes there is a great enlargement and jDro- longation of the anterior zyga- pophyses, as shown in iigures 29 and 30. These zygapophyses havewide expanding endswhich stand high above the centrum with inner faces that look almost directly inward. More posteri- orly (fig. 30) the upward inch- nation is less and the zygapo- physes gradually narrow in width dorso-ventrally to its free end. More posteriori}' still, as shown in figure 31, the anterior zygapophyses become more rod like, though their great anterior prolongation is maintained. These are in striking contrast to the comparatively weak zygapophyses of the Ceratosaurus caudals, but very similar in those of Gorgosaurus and Fig. 30.—Caudal vertebra from distal fourth of the of Antro- demus valens Leidy. No. 4734. i nat. size. Viewed from RIGHT side. Z', anterior ZYGAPOPHYSIS; Z, POSTERIOR 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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