. The Conchologists' exchange. Mollusks. THE NAUTILUS, XXII. PLATE d, 2, 3, ASHMUNELLA KOCHII CLAPP. 4, BIFIDARIA CLAPPl STERKI. 5, 6, HOLOSPIRA BARTSCHI P. & C. 7, BIFIDARIA BILAMELLATA STERKI & 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 Averell, William D. Philadelphia, Wm. D. Averell

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188