. Fresh-water biology. Freshwater biology. The Ampullarias are the largest of our fresh- water snails. Two or three species occur in Georgia and Florida. Example, A. paludosa Say, (Fig. 1448). Fio. 1448. 66 (71) Shell of moderate size, dextral, turbinate, imperforate, or subperforate; operculum corneus. Animal branchiferous. Family Viviparidae . 67 Four genera: 67, 68, 69, 70 67 (68) Shell rather thin; operculum concentric, inner margin simple. Animal with foot of moderate size, not produced beyond the snout. Teeth of the radula multicuspid. . Viviparus Several species are found in
. Fresh-water biology. Freshwater biology. The Ampullarias are the largest of our fresh- water snails. Two or three species occur in Georgia and Florida. Example, A. paludosa Say, (Fig. 1448). Fio. 1448. 66 (71) Shell of moderate size, dextral, turbinate, imperforate, or subperforate; operculum corneus. Animal branchiferous. Family Viviparidae . 67 Four genera: 67, 68, 69, 70 67 (68) Shell rather thin; operculum concentric, inner margin simple. Animal with foot of moderate size, not produced beyond the snout. Teeth of the radula multicuspid. . Viviparus Several species are found in the Mississippi Valley and from Ohio and Indiana south to the Gulf. They are usually to be distinguished from the Campelomae by the thinner and more globose shells and convex whorls. Ex- ample, Say, (Fig. 1449; X ij). fte. 1449-. 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
