. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. , Pal. Foss., vol. niagarensis, Spencer, 1884, Bull. No. 1, Mus. Univ. St. Mo., p. 60, Niagara Gr. omderUalw, HhH, 1861, liep. of Progr. Geo. Stir. Wis., Niagara (ir. This species is now referred by Prof. Hall to the genus Xautilns, se? 20th Rep. N. Y. St. Mus. Nat. Hist., p. 400. It was first described by MeCbesney, Jan. 1860, aa Cyrtoceras gigant'jum, but that name being preoc- cupied, in 1861 he proposed Lituit
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. , Pal. Foss., vol. niagarensis, Spencer, 1884, Bull. No. 1, Mus. Univ. St. Mo., p. 60, Niagara Gr. omderUalw, HhH, 1861, liep. of Progr. Geo. Stir. Wis., Niagara (ir. This species is now referred by Prof. Hall to the genus Xautilns, se? 20th Rep. N. Y. St. Mus. Nat. Hist., p. 400. It was first described by MeCbesney, Jan. 1860, aa Cyrtoceras gigant'jum, but that name being preoc- cupied, in 1861 he proposed Lituites oancellatus. If it is a Nautilus, tlie word occidenlalis being preoccupied, McChesney's name cancellatus has pre- cedence. ortoni. Meek, 1873, Ohio Pal., vol. 1, p. 186, Niagara Gr. palinuruR, Billings, 1862, Pal. Foss., vol. 1, p. 25, Calciferous Gr. I)lnto, Hillings, 1865, Pal. Foss., vol. 1, p. 2o9, Quebec Gr. robertsoni. Hall, 1861, Rep. of , p. 38, Chiizy and Black Riv. Grs. seelyi, Whitfield, 1886, Bull. Am. Mus. Nat. Hist., vol. 1, p. 330, Birdseye Gr. undatua, Emmons, 1842, (Inachus unda- tus,) Geo. Rep. N. Y., p. 394, and Pal. N. Y., vol. 1, p. 52, Black Riv. and Trenton Grs. It is not a Lituites. undatus var. occidentalis, Hall, 1861, Rep. of Progr. Wis., p. 38, Black Riv. and Trenton Grs. Mdi'i cancellxtm, Emmons, 1856, Am. (ieol. Not dt-fiiied so as to be recognized. cinrinnatite, .D'Orbigny, 1850, Prodr. d. I'aRont., t 1, p. 4. Not defined so as to be recognized. Nautilus, Bt-eynins, 17.'?2, Dissert. Polyth., p. 11. [E'.y. l^autilos, sailor or naviga- tor.] Shell subglobose, compressed; volutions coiled in the same plane, con- tiguous ; umbilicus open or ; septa simple, arched or waved on the lateral margins; siphuncle central or Bubcentral; lip sinuous on the dorsal and ventro-lateral margins; surface smooth, striate, costate, or bearingnodes. Tvpe N. pompiliuB. acraus, Hall. 1879, Pal. N Y., vol. 5, pt. 'J, p. 417, Ham. Gr. avonensis, see S
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