. Zoology : for students and general readers . Zoology. TYPICAL BIVALVES. 249 grooved, with a gland for secreting a bundle of threads, the iyssus, by means of which it is anchored to the 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879