. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palæontological science. Paleontology. Fig. 99.—Difierent views of PlatyccTas dii vrosniii, ofthe natural size. Devonian, Canada (Original.). 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 Nicholson, Henry Alleyne, 1844-1899. Edinburgh, London, Blackwood

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Keywords: ., bookaut, bookcentury1800, bookdecade1870, booksubjectpaleontology