. Elements of geology : a text-book for colleges and for the general reader. Geology. 310 PALAEOZOIC SYSTEM OF ROCKS. At present, leaving out the Holothurians, or sea-cucumbers, which, having no shell, are little apt to be preserved as fossils, the class of. 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 LeConte, Joseph, 1823-1901. New York : D. Appleton and Co.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1892