. The ancient life-history of the earth; a comprehensive outline of the principles and leading facts of palaeontological science. Paleontology. 238 HISTORICAL PALEONTOLOGY. the air-chambers is placed on the dorsal or coiivex side of the shell \ but the principal character whieh distinguishes Ammon-. 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