. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 248 Genus PLETHOMYTILUS. Hall. [Ety. : PletJto. to be full ; rnytilus, a geuus.] (1884 : Pal. X. Y., Vol. V., Pt. I., p. 14.) Shell with etjiial gibbons valves, of an outline reseml»liiig Mvtiliis, and having a finely striated ligamental area, which extends across the shorter or transverse diameter of the valve. Height greatly exceeding the length. The posterior side is slightly winged. Small, oblique, lateral teeth are present, but no cardinal teeth have been observed. Test with concentric sti'ite. Plethomytilus
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 248 Genus PLETHOMYTILUS. Hall. [Ety. : PletJto. to be full ; rnytilus, a geuus.] (1884 : Pal. X. Y., Vol. V., Pt. I., p. 14.) Shell with etjiial gibbons valves, of an outline reseml»liiig Mvtiliis, and having a finely striated ligamental area, which extends across the shorter or transverse diameter of the valve. Height greatly exceeding the length. The posterior side is slightly winged. Small, oblique, lateral teeth are present, but no cardinal teeth have been observed. Test with concentric sti'ite. Plethomytilus oviFoimis. (Conrad.) (Fig. 163.) (Pal. N. Y., Vol. v., Pt. 1., p. 255, Pis. XXXI., LXXXYH.) Distinguishing Cliaracters.— Large size; ovate ontline; beaks projecting above the cardinal line: truncate trout,. Fig. 163. Plethomiitit'; nnhnnus. valve, with attenuated beak (from Hall;. Left valve, showing: striated hinge area : right with small fissure for the passage of the byssus; wide liga- mental area. Found only in tlie upper part of the Encrinal limestone, at the lower end of Section 5 (common).. 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 Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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