. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. vjTHely oval, lenticular; valves un- equ'illy convex ; umbo of the upper or dorsal valve submarKinul, slightly pro- jecting; lower or ventral valve with a subeentral umbo, behind which a nar- row, oblong, oval slit reaches to near the posterior mflrgin, iind nthirded pas- sage to the pedicle fibers of attachment: shell punctate in the outer layers, and fibrous and of a pearly luster within. Type T. terrninalis. ci
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. vjTHely oval, lenticular; valves un- equ'illy convex ; umbo of the upper or dorsal valve submarKinul, slightly pro- jecting; lower or ventral valve with a subeentral umbo, behind which a nar- row, oblong, oval slit reaches to near the posterior mflrgin, iind nthirded pas- sage to the pedicle fibers of attachment: shell punctate in the outer layers, and fibrous and of a pearly luster within. Type T. terrninalis. ciilatn, see Obolella ciclata. canceilata, Sowerby, 1825, (Orbicula can- cellata,) Zool. Jour., vol. 2, Trenton Gr. craggit, see Obolella crassa. crassipuncta, Ulricth, 1889, Am. Geo., vol. 4, p. 22, Hud. Riv. Gr. dyerl, 8. A. Miller, 1874, Cin. Quar. Jour. Sci., vol. l,p. 347, Hud. Riv. Gr. filota, see Schizocrania filosa. fragilis, (Jlrich, 1889, Am. Geo., vol. 4, p. 21, Utica' Slate. huronensis, Billings, 1862, ||.,q 028.—Tre- Pal. Foss., vol. 1, p. 53, matlH "dyerl. Black Riv. Gr. montrealensis, Billings, 1862, Pal. Fota., vol. 1, p. 52, Trenton Gr. millepunctata. Hall, 1866, 24th Rep. N. Y. Mus. Nat. Hist., p. 221, Hud. Riv. (tr. oblata, Ulrich, 1889, Am. Geo., vol. 4, p. 23, Hud. Riv. Gr. ottawensis, Billings, 1862, Pal. Foss., vol. 1, p. 53, Trenton Gr. pannulus, see Kutorgina pannulus. punctof riata, Hall & Whitfield, 1873, 23d Rep. '. Y. Mus, Nat. Hist., p. 243, Trenton and Hud. Riv. Gr. (?) pustulosa, Hall, 1866. 24th Rep. N. Y. Mus. Nat. Hist., p. 222, Hud. Riv. Gr. quincuncialis. Miller & Dyer, 1878, Cont. to Pal. No. 2, p. 8, Hud. Riv. Gr. rudis. Hall & Whitfield, 1873, 23d Rep. N. Y. Mus. Nat. Hist., p. 243, Tren- ton Gr. terrninalis, Emmons, 1842, (Orbicula ter- rninalis,) Geo. Rep. N. Y., p. 395, and Pal. N. Y., vol. 1, p. 100, Trenton Gr. umbonata, Ulrich, 1889, Am. Geo., vol. 4, p. 23, Hud. Riv. Gr. Trematospiba, Hall, 1859, 12th Rep. N. Y.
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
