. Dinocerata : a monograph of an extinct order of gigantic mammals. Dinocerata; Mammals, Fossil; Paleontology; Paleontology. 44 DINOCERATA. young, these tusks grow from a persistent pulp, but in old age the cavity becomes nearly closed. In the male, these tusks are large and powerful, and extend downward nearly or quite to the extremity of the pendent process of the lower Figure 49.—Upper canine of Tinoceras grande, Marsh (Xo. lOiO); male. FlGUEE 00.—Upper cauine of Dinoceras latirejis, Marsh (No. 1222); male. a. lateral view showing outer surface; i. inner surface; b'. h". sections
. Dinocerata : a monograph of an extinct order of gigantic mammals. Dinocerata; Mammals, Fossil; Paleontology; Paleontology. 44 DINOCERATA. young, these tusks grow from a persistent pulp, but in old age the cavity becomes nearly closed. In the male, these tusks are large and powerful, and extend downward nearly or quite to the extremity of the pendent process of the lower Figure 49.—Upper canine of Tinoceras grande, Marsh (Xo. lOiO); male. FlGUEE 00.—Upper cauine of Dinoceras latirejis, Marsh (No. 1222); male. a. lateral view showing outer surface; i. inner surface; b'. h". sections; c. front view. The dotted Une on the teeth marks the position of the alveolar border, below which the tusk was exposed. All the fisrures are one-fourth natural size. In Dinoceras mirabile (number 1036), the canine tusks are oval in section, where they emei'ge from the jaw, then become somewhat constricted, before expanding into a wide, thin, lanceolate extremity, as shown in Plate I. On the outer surface of these tusks, there is a distinct ridge in the lower half exposed, g'iving there a subtriangular, or ba^'onet- like 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 Marsh, Othniel Charles, 1831-1899. Washington : United States Geological Survey : G. P. O.
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Keywords: ., bookcentury1800, bookdecade1880, booksub, booksubjectpaleontology
