. Carnegie Institution of Washington publication. THE UPPER TRIASSIC OF WESTERN TEXAS. 37 distance. The capitular facet stands on a short process (fig. 10) rising from the anterior outer angle of the lower face of the centrum; this process is inclined slightly backward. The anterior face of the centrum is nearly circular; the posterior face is oval, with the long axis horizontal. The neural canal is still large. The fourth vertebra has lost the upper part of the neural arch and the zygapophyses. The transverse process (fig. 11 B) is curved outward and downward; the capitular process is similar
. Carnegie Institution of Washington publication. THE UPPER TRIASSIC OF WESTERN TEXAS. 37 distance. The capitular facet stands on a short process (fig. 10) rising from the anterior outer angle of the lower face of the centrum; this process is inclined slightly backward. The anterior face of the centrum is nearly circular; the posterior face is oval, with the long axis horizontal. The neural canal is still large. The fourth vertebra has lost the upper part of the neural arch and the zygapophyses. The transverse process (fig. 11 B) is curved outward and downward; the capitular process is similar to that of the third. The lower face of the centrum is concave antero- posteriorly, but nearly flat transversely. The anterior and posterior faces are trans- versely FIG. 10.—Desmniosuchus spureiisis. A. Lateral view of first ten vertebra?; the last six as they were found connected. X B. Upper view of third to ninth cervical vertebrae. X The next six vertebrae (figs. 10 and 11) were found in close association, the first five in position and the sixth slightly distant and turned to one side. The last is thought, from its shape, to be the twelfth of the whole series and will be described in that position. In the first five the faces of the centra are transversely oval and the lower surface is flat. These characters change slowly toward the rear until in the tenth vertebra (fig. 11) the posterior face is nearly circular and the lower surface of the centrum is much narrower and longer than in those anterior to it. The zygapophyses of all are low and flat and closely overlapping. The posterior zygapophyses of the fifth vertebra show clearly a structure which is only indicated in the less perfectly preserved ones adjoining it, but is very prominent on the second axis. From a point just above the articular facet there is a strong spinous process which extends backward and outward for at least a centimeter. This character is confined to the anterior cervicals, as it
Size: 1983px × 1260px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902
