442 



CEPHALOPODA. 



[HOR. 



vagrans, Billings, 1857, Rep. of Progr. 



Can. Geo. Sur., p. 308, Black Riv. Gr. 

 validum, Hall. 1876, Illust. Devonian 



Foes., pi. 51, and Pal. N. Y., vol. 5, pt. 



2, p. 385, Schobarie grit. 



. 743. Gyroceras undulatum. 



Hortholus americanus, see Lituites ameri- 

 canus. 



HURONIA, Stokes, 1823, Geo. Trans., n. s., 

 vol. 1, p. 203. When this genus was 

 proposed, the author thought he was 

 describing a coral. Prof. Billings said 

 the name was proposed for the siphun- 

 cle of an Orthoceras, and is, therefore, 

 merely a synonym. This seems to be 

 the correct opinion, though the shells 

 to which the peculiar siph uncles be- 

 long are unknown. Type H. bigsbyi. 

 annulata, Hall, 1851, Lake Superior Land 

 Dist. by Foster & Whitney, p. 221, Ni- 

 agara Gr. 

 bigsbyi, Stokes, 1823, Trans. Geo. Soc., 



vol. 1, p. 195, Clinton Gr. 

 minuens, Barrande, 1869, Syst. Sil. de 

 Boh., 2d series, vol. 4, pi. ix, p. 435, 

 Clinton Gr. 



obliqua, Stokes, 1823, Trans. Geo. Soc., 2d 

 series, vol. 1, p. 203, Clinton Gr. 



portlocki, Stokes, 1840, 

 Trans. Geo. Soc., 2d 

 series, vol. 5, p. 710, 

 Clinton Gr. 

 sphaeroidalis, Stokes, 

 1840, Trans. Geo. 

 Soc., 2d series, vol. 5, 

 p. 710, Clinton Gr. 

 stokesi, Castelnau, 1843, 

 Syst. Sil., p. 33, Scho- 

 harie grit. Not rec- 

 ognized. 



turbinata, Stokes, 1823, 

 Trans. Geo. Soc., 2d 

 series, vol. 1, p. 203, 

 Clinton Gr. 

 FIG. 744.-Hurouia vertebralis,Stokes,1840, 

 vertebralis. Trans Geo. Soc., 2d 



series, vol. 5, p. 710, 

 Niagara and Clinton Grs. See Ortho- 

 ceras canadense. 



Hydnocercts, Conrad, 1842, Jour. Acad. Nat. 

 Sci., vol. 8. See Dictyophyton, a sponge. 



tuberosum, see Dictyophyton tuberosum. 

 LITUITES, Mont- 

 fort, 1808, 

 Conch. Svst., 

 vol. 1, p. "279, 

 [E t y . lituus, 

 trumpet. 

 Shell spiral 

 in the begin- 

 ning; last 

 chambers pro- 

 duced straight ; Fi- 745. Litnites gigan- 

 whorlsfrelor teus. Quarter size. 

 open in one plane; septa simple; si- 

 phuncle central ; section circular. Type 

 L. lituus. 



americanus, D'Orbigny, 1850, (Hortholus 

 americanus,) Prodr. d. Paleont., t. 1, p. 

 1, Black Riv. Gr. 



apollo, Billings, 1862, Pal. Foss., vol. l,p. 

 25, Calciferous Gr. 



bickmoreanus, Whitfield, 1885, Bull. Am. 

 Mus. Nat. Hist., vol. 1, p. 191, Niag- 

 ara Gr. 



ccmcellatus, McChesney, 1861, New Pal. 

 Foss., Niagara Gr. See L. occidentalis 

 and Nautilus cancellatus and N. occi- 

 dentalis. If this species, as Prof. Hall 

 suggests, is a true Nautilus, McChes- 

 ney's name has precedence. 



capax, see Nautilus capax. 



complanatus, Shumard, 1863, Trans. St. 

 Louis Acad. Sci., vol. 2, p. 107, Calcif- 

 erous Gr. 



convolvans, Schlotheim, 1813, in Jahrbuch, 

 as identified by Hall, Pal. N. Y., vol. 1, 

 p. 53. See L. americanus. 



eatoni, Whitfield, 1886, Bull. Am. Mus. 

 Nat. Hist., vol. 1, p. 331, Birdseye Gr. 



eatoni var. cassinensis. Whitfield, 1886, 

 Bull. Am. Mus. Nat. Hist., vol. 1, p. 

 332, Birdseye Gr. 



farnsworthi, Billings, 1861, Pal. Foss., vol. 

 1, p. 21, Calciferous Gr. 



graftonensis, Meek & Worth en, 1870, Proc. 

 Acad. Nat. Sci. Phil. p. 51, and Geo. 

 Sur. 111., vol. 6, p. 507, Niagara Gr. 



hercules, Winchell & Marcy, 1865, Mem. 

 Bost. Soc. Nat. Hist., Niagara Gr. Syn. 

 for Cvrtoceras amplicorne. See 20th 

 Rep. N. Y. Mus. Nat. Hist. 



imperator, Billings, 1861, Pal. Foss., vol. 

 1, p. 23, Calciferous Gr. 



magnificus, Billings, 1857, (Gyroceras 

 magnificum,) Rep. of Progr. Geo. Sur. 

 Can., p. 307, Hud. Riv. Gr. Type of 

 Hyatt's genus Aspidoceras. 



marshi, Hall, 1867, 20th Rep. N. Y. Mus. 

 Nat. Hist., p. 404, Niagara Gr. 



internistriatus, Whitfield, 1886, Bull. Am. 

 Mus. Nat. Hist., vol. 1, p. 332, Birds- 

 eve Gr. 



multicostatus, Whitfield, 1880, Ann. Rep. 

 Geo. Sur. Wis., p. 67, and Geo. Wis., 

 vol. 4, p. 303, Niagara Gr. 



murchisoni, Truest. Not defined so as to 

 be recognized. 



