. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. lOO CONCHOLOGIA CESTRICA. S. rosaceum, Prime. Cyclas rosaceum, Prime, Bost. Proc, IV., 1851. S. rosaceum, — [Prime.] Fig. 201. Shell, small, round-oval, fragile, transparent, sub- equilateral ; margins generally rounded ; beaks calycu- late, approximate, inclined forward; valves very slight, a little convex, fine striate; epidermis reddish-brown, shining; teeth very slight, laterals elongated. H. 4^, W. 6, T. 314, mill. Station, Pickering Creek, and Schuylkill River, Ches- ter County ; rare. S. pa
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. lOO CONCHOLOGIA CESTRICA. S. rosaceum, Prime. Cyclas rosaceum, Prime, Bost. Proc, IV., 1851. S. rosaceum, — [Prime.] Fig. 201. Shell, small, round-oval, fragile, transparent, sub- equilateral ; margins generally rounded ; beaks calycu- late, approximate, inclined forward; valves very slight, a little convex, fine striate; epidermis reddish-brown, shining; teeth very slight, laterals elongated. H. 4^, W. 6, T. 314, mill. Station, Pickering Creek, and Schuylkill River, Ches- ter County ; rare. S. partumeium, Say. Cyclas partumeium. Say, Acad. Nat. Science, Jour. II., 1822. jS. partumeium. — [Prime.] Fig, Shell, round-oval, thin, pellucid, nearly equilateral, anterior inargin slightly distended; posterior rather abrupt; beaks central, calyculate, approximate; striae scarcely visible; glossy, greenish horn color; valves moderately convex; hinge margin nearly straight; cardinal teeth strong; laterals very much elongated. H. 13, W. II, T. 8, mill. Station, stagnant ponds on White Clay and Pickering Creeks, Chester County ; 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 Hartman, William Dell, 1817-1899; Michener, Ezra, 1794-1887. Philadelphia, Claxton, Remsen & Haffelfinger
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmollusks, bookyear187
