. Fresh-water biology. Freshwater biology. Fig. 915. Gastropus kyptopus Ehr. X 170. (After Hudson and Gosse.) Fig. 917. Gastropus stylifer Imhof. X 200 (After Weber.). 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