. The geological history of plants. Paleobotany; 1888. Fio. 52.—Alethopteris grandia (Dawson). Middle ooal-fonnation of Nova Pio. 58.—OyclopterU (Anmmies) Aoadiea (Dawson), a tree-fern of the Lower Cfarboniferous. a, Pinnules, b, Fragment of petiole, c, Ee- m^B of fertile 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 Dawson, John William, Sir, 1820-1899. New York, D. Appleton and Company


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