. Carnegie Institution of Washington publication. 38 NEW REPTILES AND STEGOCEPHALIANS FROM The neural spine of the fifth is low, thin, and broad, but posterior to this one the spines of the vertebrae increase in height, become thinner at the base, transversely, and elongate antero-posteriorly, and develop a knob or expansion at the apex. The transverse processes rise progressively toward a horizontal position and increase in length and thickness. On the sixth vertebra is seen the beginning of a ridge running from the upper outer angle of the posterior face of the centrum to the base of the tra
. Carnegie Institution of Washington publication. 38 NEW REPTILES AND STEGOCEPHALIANS FROM The neural spine of the fifth is low, thin, and broad, but posterior to this one the spines of the vertebrae increase in height, become thinner at the base, transversely, and elongate antero-posteriorly, and develop a knob or expansion at the apex. The transverse processes rise progressively toward a horizontal position and increase in length and thickness. On the sixth vertebra is seen the beginning of a ridge running from the upper outer angle of the posterior face of the centrum to the base of the transverse process; this continues to increase in importance until on the eighth it is continued on to the lower face of the process as a thin supporting ridge inclined backward, and the cross-section of the process is that of a T-beam. In the same manner the capitular process increases in thickness and weight, but not in length. On the ninth vertebra this process is over a centimeter in its two diameters, and a low, sharp ridge runs from its upper face upward near the anterior face of the centrum, until it joins the ridge on the lower face of the transverse process at the level of the base of the neural FIG. 11.—Desmatosuchus spurensis. A to G. Anterior views of the third to ninth cervical vertebrae. The figure of the fifth vertebra is slightly restored. X H. Posterior view of a duplicate tenth (?) vertebra, No. 7504, U. of Mich. X In all these vertebrae the neural arch is deeply excavated between the zygapophyses both anteriorly and posteriorly, so that a considerable portion of the neural canal is left uncovered between the vertebrae. The vertebrae posterior to the ninth were all found isolated, with the exception of the one reckoned as the twelfth and a few in the mid-dorsal region. They have been placed according to their size and form. There may be some error, but it can hardly be more than one position. In the vertebra reckoned as the tenth the zygapophy
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