. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Ptyo. 842. tope: ?cd, Ohio, Voin, 186S, 217) and Oestocephalus (Trans. Am. Philos. Soc. Phila XIV, p. 20) were re named Ptyonius (Trans. A. F. S. April, 1874) ; are the most fish-like of the ancient frogs; with num- erous small, both simple and grooved teeth, extending in one species at least to the tips of the slender jaws; and with a head which is a curious miniature of the later Ichthyosaurus. Compare the Irish genus Lepterpeton^ Huxley; and Urocor- dalys,
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Ptyo. 842. tope: ?cd, Ohio, Voin, 186S, 217) and Oestocephalus (Trans. Am. Philos. Soc. Phila XIV, p. 20) were re named Ptyonius (Trans. A. F. S. April, 1874) ; are the most fish-like of the ancient frogs; with num- erous small, both simple and grooved teeth, extending in one species at least to the tips of the slender jaws; and with a head which is a curious miniature of the later Ichthyosaurus. Compare the Irish genus Lepterpeton^ Huxley; and Urocor- dalys, Huxley. In the figure the three thoracic shields have been displaced; no teeth preserved; nothir g like limbs shown; back armour consists of long, narrow sub-cylindrical scales, diverging from the middle line (as in the long rod-like pieces or Oestocephalus>) XIIL Ptyonius nummifer, Cope, Pal. Ohio, Vol. 2, 1875, page X(IL Cope. Ftctte XL. 374, plate 40, fig. 2, 3, both natural size. Two specimens of this reptile are described by Cope (p. 374, 375.) One shows well developed tail fans; breast shields of a peculiar form (no side shields visible) sculptured in strong ridges; a head differ- ent from and wider than that of the other four known species;. 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 Lesley, J. P. (J. Peter), 1819-1903; Pennsylvania. Board of Commissioners for the Second Geological Survey. Harrisburg, Board of Commissioners for the Geological Survey
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea
