. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. m GASTEROPODA. [amp.—H i; erecta, see Platyceras erectain. ovali$, Hee PlatyceraH ovale. niagarevtis, see Platyceras iiinitarense. trigonalk, Hce Platyceras trigoiiale. Ampullaria, LamarcK, 1801, ^Ht. An. t^v? Vert. [Ety. ampulla, a flask.] Not a Pala'ozoic genus. heticoidef, see Holenificus lielicoides. powelH, Walcott, 1883, Science, vol. 2, p. 808, and Monogr. U. 8. Geo. Hnr., vol. 8, p. 261, Subcarbonifero
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. m GASTEROPODA. [amp.—H i; erecta, see Platyceras erectain. ovali$, Hee PlatyceraH ovale. niagarevtis, see Platyceras iiinitarense. trigonalk, Hce Platyceras trigoiiale. Ampullaria, LamarcK, 1801, ^Ht. An. t^v? Vert. [Ety. ampulla, a flask.] Not a Pala'ozoic genus. heticoidef, see Holenificus lielicoides. powelH, Walcott, 1883, Science, vol. 2, p. 808, and Monogr. U. 8. Geo. Hnr., vol. 8, p. 261, Subcarboniferouu Anomi>, Meek & Worthen, 1860, Proc. Acad. Nat. Sci., p. 208. [Ety. arumi- phalot, without an umbilicus.] A heli- coid shell of three or more volutions, and havinjr an aperture transversely suboval. Type A rotulus. meeki, see Dawsonella meeki. rotulus. Meek & Worthen, 1800, Proc. A. 50. [Ety. mythological name.] Shell thick, symmetrical, globose, in- volute ; sinus in the middle of the outer lip, from which a band extends back- ward along the outer surface of the vo- lution ; inner lip thickened, expanded on the inrolled spire. Type B. vasulites. acutilira. Hall, 1862, 15th Rep. N. Y. Mus. Nat. Hist., p. 56, Ham. Gr. acutus, Sowerby, 1839, Murch. Sil. Syst., p. 043, Low. Silurian. allegoricus. White, 1874, Rep. Invert. Fobs., p. 10, and Geo. Sur. W. 100th Mer., vol. 4, p. 55, Quebec Or. alternodosus, Whitfield, 1882, Ann. N. Y. Acad. Sci., vol. 2, p. 225, Kaskaskia Gr. angustala, see Bucania angustata. antiquatus, Whitfield, 1878, Ann. Rep. Geo. Sur. Wis., p. 52, and Geo. Wis., vol. 4, p. 170, Potsdam Gr. spertus, Sowerby, 1825, Min. Conch., vol. 5, p. 108, Subcarboniferous. argo, Billings, 1860, Can. Nat. and Geol., vol. 5, p. 167, Black Riv. and Tren- ton Gr. auriculatus, Hall, 1852^ Pal. N. Y., vol. 2, p. 334, Coralline limestone. barquensis, Winchell, 1802, Proc. Acad. Nat. Sci., p. 425, Marshall Gr. bidortalus, see Bucania bidorsata. bilabiatufl. W
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