. Fresh-water biology. Freshwater biology. 986 FRESH-WATER BIOLOGY 59 (60) Shell large, thick and solid; apex smooth Lanx Clessin. This genus is restricted to the Pacific coast and is distinguished by the large size and thick soUd shells. Type, L. newberryi (Fig. 1443). Fig. 1443. 60 (61) Shell ancyliform, small, thin, with a septum across the apical portion of the interior Gundlachia Pfeifier. This very remarkable and pecuUar genus has a general but very local distribution from the Atlantic to the Pacific. Example, G. meekiana Stimp., (Fig. 1444; X 6), from the Eastern States. Fig. 1444
. Fresh-water biology. Freshwater biology. 986 FRESH-WATER BIOLOGY 59 (60) Shell large, thick and solid; apex smooth Lanx Clessin. This genus is restricted to the Pacific coast and is distinguished by the large size and thick soUd shells. Type, L. newberryi (Fig. 1443). Fig. 1443. 60 (61) Shell ancyliform, small, thin, with a septum across the apical portion of the interior Gundlachia Pfeifier. This very remarkable and pecuUar genus has a general but very local distribution from the Atlantic to the Pacific. Example, G. meekiana Stimp., (Fig. 1444; X 6), from the Eastern States. Fig. 1444. 61 (62) Shell small, spiral, dextral, neritoid, or crepidtila-Uke, with a broad, thin, columeUar plate projecting across the end of the aper- ture next to the spire Amphigyra Pilsbry. Only a single species, .4. alabamensis Pils., (Fig. 1445; X 10), from the Coosa River, Alabama, is 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
