. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. ;ethontls linearis. )e, 1871, Proc. Am. ', [Ely. Phlegethm, » hell.] Head elongate, triangular; body and tail extremely elongate ; dorsal vertebra; without ribs, caudala without dilated spines; no vertebnt- armature; no limbs. Type P. linearis. linearis. Cope, 1871, Proc, 177, and Ohio Pal, joal Meas. serpens, Cope, 1871, Proc p. 177, and Ohio Pal. Coal Meas. l'i,EUuoi-i'YX, Cope, 1875, Ohio Pal., vol. 2, p. 370.
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. ;ethontls linearis. )e, 1871, Proc. Am. ', [Ely. Phlegethm, » hell.] Head elongate, triangular; body and tail extremely elongate ; dorsal vertebra; without ribs, caudala without dilated spines; no vertebnt- armature; no limbs. Type P. linearis. linearis. Cope, 1871, Proc, 177, and Ohio Pal, joal Meas. serpens, Cope, 1871, Proc p. 177, and Ohio Pal. Coal Meas. l'i,EUuoi-i'YX, Cope, 1875, Ohio Pal., vol. 2, p. 370. [Ety. phura, a rib; plyx, a fold, wing.] Founded upon the vertebral column and ribs; vertebrae of moderate length, zygapophyses well developed, short neural spine in the dorsal region, not sculptured; ribs short, stout, and support a wing on the posterior or con- ; border, which expands downward, and il^en abruptly contracts to the Bhaft; it is broad and truncate, and in ci;ides a medullary cavity partially filled witr cancellated tissue. clavatu^. Cope, 1875, Ohio Pal., vol. 2, p. 870, Coal Meas. Ptyonius, Cope, 1876, Ohio Pal., vol. 2, p. 373. [Ely. ptyon, a fan.] Form elon- gate, with long tail and lane e o 1 a t e cranium ; limbs weak, only poste- rior known; three pec- toral shields; abdomen protected by packed os- seous rods arranged in chevron with •angle direct- ed forward; neural and h ee m a 1 spines of caudal ver- tebrae ex- panded and tan-like; ribs well devel- oped ; teeth small, nu- merous, aim- pie or groov- ed. Type P. nummifer. marshi. Cope, 1875, (Colos- teus marshi,) Trans. Am. Phil. Soc, vol. 14, p. 24, and Ohio Pal., vol 2, p. 375, Coal Meas. nummifer, Cope, 1876, Ohio Pal., vol. 2, p. 374, Coal Pm. 1192.—Ptyonius serrula. pectinatus. Cope, 1868, (Sauropleura pec- tinata, Proc. Acad. Nat. Sci., p. 216, and Ohio Pal., vol. 2, p. 377, Coal Mens. serrula, Coi)e, 1871, (Oestocephalus ser- rula,) Proc. Am. Phil. Soc, p. 17
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
