. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 829.—Uoniophora obemnngeusis. plicata, Hall, 1858, (Cypricardella plicata,) Trans. Alb. Inst., vol. 4, p. 18, and Bull. Am. Mus. Nat. Hist., p. 66, Warsaw Gr. rugosa, Conrad, 1841, (Cypricardites ru- gosus,) Ann. Rep. N. Y., p. 53, and Pal. N. Y., vol. 5, p. 297, Ham. Gr. speciosa. Hall, 1879, Desc. New. Spec. Foss., p. 17, and 11th Rep. Geol. Indi- ana, p. 317, Niagara Gr. siibrecta. Hall, 1885, Pal. N. Y.,
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. 829.—Uoniophora obemnngeusis. plicata, Hall, 1858, (Cypricardella plicata,) Trans. Alb. Inst., vol. 4, p. 18, and Bull. Am. Mus. Nat. Hist., p. 66, Warsaw Gr. rugosa, Conrad, 1841, (Cypricardites ru- gosus,) Ann. Rep. N. Y., p. 53, and Pal. N. Y., vol. 5, p. 297, Ham. Gr. speciosa. Hall, 1879, Desc. New. Spec. Foss., p. 17, and 11th Rep. Geol. Indi- ana, p. 317, Niagara Gr. siibrecta. Hall, 1885, Pal. N. Y., vol. 5, p. 304, Chemung Gr. transiens, Billings, 1874, Pal. Foss., vol. 2, p. 134, Up. Sil. trigona. Hall, 1885, Pal N. Y., vol. 5, p. 302, Chemung Gr. truncata, Hall, 1883. Pal. N. Y., vol. 5, pi. 44, fig. 15, Ham. Gr. GossELETTiA, Barrois, 1881, Ann. Soc. Geol. du Nord, vol. 8, p. 176. [Ety. proper name.] Shell subtriangular, truncate on the anterior side, subalate posteri- orly; ligamental area wide, longitudi- nally striate; cardinal teeth below the beak strong; lateral teeth elongate; surface with concentric striee. Fig. 830.—Qosselettia triquetra. Rlgbt valve. triquetra, Conrad, 1838, (Fterinea trir|ue- tra,) Ann. Rep. Geo. N. Y., p. IKi, and Pal. N. Y., vol. 5, pt. 1, p. 2(15, Ham. Gr. Grahmysia, DeVerneuil, 1847, Bull. Soo. Geo. France, 2d ser., vol. 4, p. 6%. [Ety. gramme, a liub ot writing; Myn, a mussel shell, in allusion to the transverse furrows . which cross the valve^ from the umbones to the middle of the ventral marain.] Equivalve, in- equflateral: shell thick, oblong; unterior Hide short, contracted by a deep oval lunette beneath the beak; posterior end elliptically rounded; hinge-line straight; two large adductor impreHsions in each valve, anterior rounded, posterior pear-shaped; pallial scar entire; cartilage exteriial, short, in the anterior partoi a deep depresHion formed by the inflexion of the hin^e margins; an oblique furrow extendn from the beak
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
