. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. CONCHOLOGIA CESTRICA. // Animal, foot large, greatly produced beyond the rostrum, narrow, and rounded behind, truncated in front; rostrum short; tentacles broader, and shorter, than in Melantho; the right one, in the male, only one-third the length of the left; operculum with a sub- spiral nucleus. L. subcarinata, Say. Paludina subcarinata. Say, Nich. Encyc, 3d Amer. Edit., 1819. Shell, whorls 3 or 4, reticulated, with striae, and wrinkles ; apex truncate, and re-entering; suture deeply impressed;
. Conchologia cestrica. The molluscous animals and their shells, of Chester county, Pa. Mollusks. CONCHOLOGIA CESTRICA. // Animal, foot large, greatly produced beyond the rostrum, narrow, and rounded behind, truncated in front; rostrum short; tentacles broader, and shorter, than in Melantho; the right one, in the male, only one-third the length of the left; operculum with a sub- spiral nucleus. L. subcarinata, Say. Paludina subcarinata. Say, Nich. Encyc, 3d Amer. Edit., 1819. Shell, whorls 3 or 4, reticulated, with striae, and wrinkles ; apex truncate, and re-entering; suture deeply impressed; aperture oval, more than half the length of the shell; carina, two, or three, or absent; color brownish - green ; within bluish-white. H. 15, W. 9, mill. Station, Schuylkill River, Chester County; abundant. i. subcarinata. [W. G. B.] Fig. Iiingunl Dentition of Zi. snb- cnrinata. — [W. G. B.] Fig. 158. Operculum of £. stib- carinntn.—[W. G. B.] Fig. 159. Obs. — Our shell differs, somewhat, from the same species found in Western waters. Family VALVATID^E. Animal of V. tficarinata, — [W. G. B.] Fig. 160. Shell, spiral, turbinate, or discoid; peristome entire. 7*. 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
