. Fresh-water biology. Freshwater biology. Fig. VI. Physa hutnerosa Gld, Ancylidae Fig. VII. Gundlachia meekiana Stimp. Ampullarudae Fig. VIII. Ampttllaria paludosa Fig. IX. Viviparus interiextus 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 Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc. ,etc. ]

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918