. A text-book of invertebrate morphology. Invertebrates. TYPE ANNELIDA. 229 which each ring of the middle region of the body bears an appendage which functions as a gill. In another marine form, Pontobdella, large warts occur on certain rings, which prob-. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. New York, H. Holt and Company

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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894