. Fresh-water biology. Freshwater biology. Fig. 1508. 143 (144) Male shell with a wide, radiating, shallow depression in front of the posterior ridge. Female with a small, rounded, well-defined radial post-basal swelling. Subgenus Scalcnaria Agassiz. The type, Truncilla sulcata Lea (Fig. 1509), ranges from the Tennessee River north to southern iVIichigan. Two other species occur in Tennessee and 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
. Fresh-water biology. Freshwater biology. Fig. 1508. 143 (144) Male shell with a wide, radiating, shallow depression in front of the posterior ridge. Female with a small, rounded, well-defined radial post-basal swelling. Subgenus Scalcnaria Agassiz. The type, Truncilla sulcata Lea (Fig. 1509), ranges from the Tennessee River north to southern iVIichigan. Two other species occur in Tennessee and 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
