. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. THE LOWER SILURIAN PERIOD. 113 ceras further agrees with the Pearly Nautilus in the fact that the partitions or septa separating the different air-chambers are. 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. New York, A. L. Fowle

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Keywords: ., bookcentur, bookdecade1870, booksubjectpaleontology, bookyear1876