. Fresh-water biology. Freshwater biology. Fig. 1518. 156 (tsq) Male and female shells different, the latter being more or less inflated in the post-basal region. Shell triangular ovate, with a distinct, often sharp posterior ridge; hinge complete. Marsupium kidney-shaped, occupying the posterior portion of the outer gills, but not extending quite to the hinder end. Plagiola Agassiz . 157. 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 or
. Fresh-water biology. Freshwater biology. Fig. 1518. 156 (tsq) Male and female shells different, the latter being more or less inflated in the post-basal region. Shell triangular ovate, with a distinct, often sharp posterior ridge; hinge complete. Marsupium kidney-shaped, occupying the posterior portion of the outer gills, but not extending quite to the hinder end. Plagiola Agassiz . 157. 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
