. Fresh-water biology. Freshwater biology. Fig. 1527. 167 (168) Shell porcellanous, subtrigonal, thick, and solid; ligament external; hinge with true cardinal teeth and with both anterior and posterior laterals; pallial line with a distinct sinus. Family Cyrenid,\e. Only a single genus Cyrena Lamarck. Represented in our fresh-water fauna by a single species, C. cdfoliucnsis Bosc (Fig. 1528), found in streams and brackish water near the coast from South Carohna to Texas. tir 1S2S 16S (173) Shell non-nacrcous, usually small and thin; hinge with cardinal and both anterior and posterior lateral te
. Fresh-water biology. Freshwater biology. Fig. 1527. 167 (168) Shell porcellanous, subtrigonal, thick, and solid; ligament external; hinge with true cardinal teeth and with both anterior and posterior laterals; pallial line with a distinct sinus. Family Cyrenid,\e. Only a single genus Cyrena Lamarck. Represented in our fresh-water fauna by a single species, C. cdfoliucnsis Bosc (Fig. 1528), found in streams and brackish water near the coast from South Carohna to Texas. tir 1S2S 16S (173) Shell non-nacrcous, usually small and thin; hinge with cardinal and both anterior and posterior lateral teeth; no hinge plate; pallial line simple. . Family \E 169 Four genera: 169, 170, 171, 172. 169 (170) Shell oval, equilateral; beaks nearly subcentral; nepeonic valves not distinctly separated from the subsequent growth of the shell; cardinal teeth two in each valve. Sphacrium Scopoli. This group contains the largest species of the family and is easily distinguished from Musculium by the thicker, striate shell and noncalyculate beaks. The species are numerous and of general distribution. Example, 5. simile Say (,Fig. 1529; X il).. 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
