. Carnegie Institution of Washington publication. 2l6 FOSSIL TURTLES OK NORTH AMERICA. longiceps the type of Puppigerus, and the latter is not congeneric with Chelonia grandava, this species can not be placed under Puppigerus. A study of the known materials of Chelonia grandceva makes it apparent that the first costal bone was articulated with the nuchal and the first peripheral of each side and that some of the costals were articulated proximallv with 3 neurals each. In these respects the species differs from any belonging to either Chelonia, Eretmochelys, or Caretta. As regards the relations
. Carnegie Institution of Washington publication. 2l6 FOSSIL TURTLES OK NORTH AMERICA. longiceps the type of Puppigerus, and the latter is not congeneric with Chelonia grandava, this species can not be placed under Puppigerus. A study of the known materials of Chelonia grandceva makes it apparent that the first costal bone was articulated with the nuchal and the first peripheral of each side and that some of the costals were articulated proximallv with 3 neurals each. In these respects the species differs from any belonging to either Chelonia, Eretmochelys, or Caretta. As regards the relations of the costals to the neurals, we find similar conditions in a spec- imen of Colpochelys kempi in the American Museum of Natural History. In this there are apparently 13 neurals, and the costals of the third, fourth, fifth and sixth pairs articulate each with 3 of these neurals. Nevertheless, nearly all the neurals are hexagonal, none octagonal, as in Testudo, where some costals articulate with 3 neurals. On a comparison of the widths of the costals with the lengths of the neurals we find a confirmation of the conclusion that there were, as in Colpochelys, more than 8 neurals. But while agreeing with Colpochelys in these respects Procolpochelys differs from it in another. In Colpochelys the end of the rib of the first costal bone enters a pit in the fourth or fifth peripheral, while in Procolpochelys grandceva, as in most Cheloniidae, the end of the first costal rib enters a pit in the third peripheral. Procolpochelys is therefore distinguisht from all the hitherto recognized genera of Che- loniidae. On pages 8, 9, and 10 Colpochelys kempi has been referred to the genus Figs. 273 and 274.—Procolpochelys grandava. Neurals. X§. 273. Two neural bones. Type. 274. Neural. No. Procolpochelys grandaeva (Leidy). Figs. 273-280. Chelonia grandava, Leidy, 1'roc. Acad. Nat. Sci. Pliila., v, 1851, p. 329; Ibid., VIII, 1856, p. 303.— Cope, Cook's Geol. New J
Size: 2590px × 965px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1908
