. Animals before man in North America; their lives and times. Paleontology. The Era of Invertebrates one function of life. Besides being tlie highest types of early life, trilobites are the most im-. 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 Lucas, Frederic A. (Frederic Augustus), 1852-1929. New York, D. Appleton and company

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1902