. Fresh-water biology. Freshwater biology. Fig. 1510. 145 (142) Male shell with a wide, shallow, radiating depression in front of the posterior ridge. Female with a rounded, foliaceous swelling at the posterior base. Subgenus Pilea Simpson. Eight species, found mostly in the Tennessee drainage, but ranging north to southern Michigan and west to Arkansas. Type, Truucilla personata Lea (Fig. 1511).. 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 resembl
. Fresh-water biology. Freshwater biology. Fig. 1510. 145 (142) Male shell with a wide, shallow, radiating depression in front of the posterior ridge. Female with a rounded, foliaceous swelling at the posterior base. Subgenus Pilea Simpson. Eight species, found mostly in the Tennessee drainage, but ranging north to southern Michigan and west to Arkansas. Type, Truucilla personata Lea (Fig. 1511).. 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
