. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 15 Alet. Alethopteris sullivaiiti. See Callipteridium suUivanti. XIIL Alethopteris virginiana. Fontaine & White, Geol. Pa., PF, 1880, page 88, plate 32, figs. 1 to 5; 33 figs. 1 to 4 Finnc'© very long, because fragments of one-foot length are found, but always single fallen ones, often the only plant pre- served by thousands in the upper fine parting shale (under top bench) of the Waynesburg coal, at Cassville. In the roof shale of the top coal ben
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. 15 Alet. Alethopteris sullivaiiti. See Callipteridium suUivanti. XIIL Alethopteris virginiana. Fontaine & White, Geol. Pa., PF, 1880, page 88, plate 32, figs. 1 to 5; 33 figs. 1 to 4 Finnc'© very long, because fragments of one-foot length are found, but always single fallen ones, often the only plant pre- served by thousands in the upper fine parting shale (under top bench) of the Waynesburg coal, at Cassville. In the roof shale of the top coal bench, full of all other plants, this Ale- thopteris is wholly absent at Cassville and elsewhere. Has a great variety of forms running into each other. Plate 33, fig. 1, shows swellings (? fruits). Compare Lesq. 111. Rt. 4, pi. 10, f. 6, for similar fruitage to A, inAata. Upper coal measures.— XVIL Note.—The genus Alethopteris includes many of the most common ferns of the coal age, especially Aleth. lonchitica^ which abounds in all coal regions, and seems to have been as common in the coal swamps as the Pteris aquilina is now in Europe and America. The characteristic feature of its leaflets is that they adhere to the little stalk by their whole base and touch each other at their bases. 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
