. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. CeoUlLVoLZFlate^h^. plate 5j (H.) tigs. 15 ^, to iJ li; common in and characteristic of the Meniscus "sponge bearing" {Niagara) beds of Middle Tennessee. F5. Petrodus occidentalis. New. & Wor. Geol. 111. Vol. 2, Xin -'^ IS. y^^ 2.' 866, page 70, plate 4, figs. 15, 15 a, 15 h top and side views of two specimens offish-teeth (?) 16, 16 a, a supposed variety of the same species, which is much like P. patelliformis^ McCoy, from the Irish Mountain li
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. CeoUlLVoLZFlate^h^. plate 5j (H.) tigs. 15 ^, to iJ li; common in and characteristic of the Meniscus "sponge bearing" {Niagara) beds of Middle Tennessee. F5. Petrodus occidentalis. New. & Wor. Geol. 111. Vol. 2, Xin -'^ IS. y^^ 2.' 866, page 70, plate 4, figs. 15, 15 a, 15 h top and side views of two specimens offish-teeth (?) 16, 16 a, a supposed variety of the same species, which is much like P. patelliformis^ McCoy, from the Irish Mountain limestone. Agassiz suggested that these were not teeth, but tubercles on the skin of the fish, like the shagreen of the Sharks, and Kays ; their bases show that they could not have touched each other as teeth do. They difi<er wonderfully, some being ten times as large as others, some circular, some oval, some with sharp points and ridged, others nearly smooth. Belleville, 111. Coal measures. XIIL Petrolystra gigantea, Scudder. An insect found in the tierh ^^^ Oligocene tertiary hed of Florissant, Colorado. Figure taken from Zittel's handbuch der Palae- onthologic, fig. 992 natural size,— Tert, 992:.. 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
