. Annual report of the Regents. New York State Museum; Science. 208 NEW YORK STATE MUSEUM. Genus liopteria Hall [Ety.: XsJo?, smooth; Tzrepov, wing] (1883. Pal. N. Y. V. 5, pt I, p. 4) Shell aviculoid, oblique, subrhomboidal; anterior end not auricu- late; wing large, extremity produced. Hinge narrow, furnished with a slender lateral tooth just pos- terior to the beak and nearly parallel to the hinge line. Ligament external; ligamental area narrow, extending the entire length of the hinge, marked by fine, sharp, longitudinal striae. Test with concentric striae but without rays. Liopteria (?) s
. Annual report of the Regents. New York State Museum; Science. 208 NEW YORK STATE MUSEUM. Genus liopteria Hall [Ety.: XsJo?, smooth; Tzrepov, wing] (1883. Pal. N. Y. V. 5, pt I, p. 4) Shell aviculoid, oblique, subrhomboidal; anterior end not auricu- late; wing large, extremity produced. Hinge narrow, furnished with a slender lateral tooth just pos- terior to the beak and nearly parallel to the hinge line. Ligament external; ligamental area narrow, extending the entire length of the hinge, marked by fine, sharp, longitudinal striae. Test with concentric striae but without rays. Liopteria (?) subplana (Hall) (Fig. 136). Avicula subplana Hall (1852. Pal. N. Y. 2:283, Pl- 59) Distinguishing characters. Depressed convex surface; similarity of right and left valves; ill defined wing and ear; concentric striae; absence of radii. Found in the Rochester shale at Lockport associated with Pterinea emacerata, etc. (Hall). Probably also at Niagara. The generic reference is provisional. Genus lyriopecten Hall [¥.ty.: Xuptov, small lyre; pecten, comb, i. e. the genus Pec- ten] (1884. Pal. N. Y. V. 5, pt I, p. 12) Shell inequivalve, with a short hinge line and very small anterior ear. Cartilage in shallow furrows^ parallel to the hinge margin. Surface ornamented with rays. Lyriopecten orbiculoides (nom. nov.) cf. Avicula (?) or- b i c u 1 a t a Hall (1852. Pal. N. Y, 21284, pi. 59) Distinguishing characters. Right (?) valve convex; left (?) valve flat; form suborbicular, hinge line short, straight; strong radiating striae cancelated by equally strong concentric striae, forming sur- face similar to Pterinea 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 New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
