Archive image from page 59 of The dinosaurs of North America The dinosaurs of North America dinosaursofnort00mars Year: 1896 184 DINOSAURS OF NORTH AMERICA vertebrae are much longer than the corresponding vertebra? of Moro- saurus, and have a very long, deep cavity in each side of the centrum, to which the generic name refers. All the trunk vertebrae hitherto found are proportionately nearly double the length of the corresponding centra of Morosaurus, and the lateral cavity is still more elongate. These points are shown in the posterior dorsal vertebra represented in figs. 4 and 5 of PI. XL.
Archive image from page 59 of The dinosaurs of North America The dinosaurs of North America dinosaursofnort00mars Year: 1896 184 DINOSAURS OF NORTH AMERICA vertebrae are much longer than the corresponding vertebra? of Moro- saurus, and have a very long, deep cavity in each side of the centrum, to which the generic name refers. All the trunk vertebrae hitherto found are proportionately nearly double the length of the corresponding centra of Morosaurus, and the lateral cavity is still more elongate. These points are shown in the posterior dorsal vertebra represented in figs. 4 and 5 of PI. XL. The neural arch in this region is lightened by cavities, and is connected with that of the adjoining vertebras by the diplosphenal articulation. A dorsal centrum of another species is shown below in tigs. 35-37. The sacral vertebrae in Pleuroccelus are more solid than in Moro- saurus, but more elongate. The surface for the rib, or process which abuts against the ilium, is well in front, more so than in any of the known Fig. 35.—Dorsal vertebra of Plettroccelus montanus Marsh; side view. Fin. 36.—The same vertebra; top view. Fig. 37.—The same; back view. :;s 39 40 41
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