452 



CEPHAL OPODA. 



[PET. PHR. 



tenere, Hall, 1879. Pal. N. Y., vol. 5, p. 



285, Ham. Gr. 



tenerum, Billings, I860, Can. Nat. and 



Geo., vol. 5, p. 174, Black Riv. Gr. 

 tenui-annulatum, Hall, 1859, Pal. N. Y., 



vol. 3, p. 345, Low. Held. Gr. 

 tenuiseptum, Hall, 1847, Pal. N. Y., vol. 



1, p. 35, Chazy Gr. 

 teretiforme, Hall, 1847, Pal. N. Y., vol. 1, 



p. 198, Trenton Gr. 

 tersum, Hall, 1879, Pal. N. Y., vol. 5, p. 



286, Ham. Gr. 



tetricum, Hall, 1862, 15th Rep. N. Y. 



Mus. Nat. Hist., p. 45, and Pal. N. Y., 



vol. 5, pt. 2, p. 251, Schobarie grit, 

 textile, Hall, 1847, Pal. N. Y., vol. 1, p. 



199, Trenton Gr. 

 textum, Hall, 1879, Pal. N, Y., vol. 5, p. 



285, Ham. Gr. 

 thestor, Hall, 1879, Pal. N. Y., vol. 5, p. 



302, Marcellus shales, 

 thoas. Hall, 1862, 15th Rep. N. Y. Mus. 



Nat. Hist., p. 75, and Pal. N. Y., vol. 



5, pt. 2, p. 61, Schoharie grit, 

 thyestes, Hall, 1879, Pal. N. Y., vol. 5, p. 



306, Portage Gr. 

 tityrus, Billings, 1865, Pal. Foss., vol. 1, 



p. 316, Quebec Gr. 

 transversum, S. A. Miller, 1875, Gin. Quar. 



Jour. Sci., vol. 2, p. 129, Hud. Riv. Gr. 



FIG. 755. Orthoceras transversum. 



trentonense, see Cyrtoceras trentonense. 



turbidum, Hall & Whitfield, 1875, Ohio 

 Pal., vol. 2, p. 100, Hud. Riv. Gr. 



typus, Saemann, as identified by Hall, 

 1876, Illust. Devonian Foss., is O. mar- 

 cellense. 



undulatum, Owen, 1840, Rep. on Min. 

 Lands, Niagara Gr. The name was pre- 

 occupied by Sowerby in 1812. See 0. 

 iowense. 



undulostriatum, Hall, 1847, Pal. N. Y., 

 vol. 1, p. 202, Trenton Gr. 



unionense, Worthen, 1875, Geo. Sur. 111., 

 vol. 6, p. 505, Niagara Gr. 



varro, Billings, 1866, Catal. Sil. Foss. 

 Antic., p. 84, Niagara Gr. 



varum, Hall, 1879, Pal. N. Y., vol. 5, p. 

 259, Schoharie grit. 



vaslator, Hall, 1879, Pal. N. Y., vol. 5, p. 

 243, Schoharie grit. Correct in the in- 

 dex, but printed 0. obliquum, on page 243. 



velox, Billings, 1865, Pal. Foss., vol. 1, p. 

 173, Chazy Gr. 



vertebrate, Hall, 1847, Pal. N. Y., vol. 1, p. 

 201. Preoccupied by Schlotheim in 1820, 

 and by Eichwald in 1840. See O. olorus. 



veterator, Billings, 1865, Pal. Foss., vol.1, 

 p. 350, Calciferous Gr. 



viator, Hall, 1879, Pal. N. Y., vol. 5, p. 

 270, Up. Held. Gr. 



vinchellanum, S. A. Miller, 1883, 2d Ed. 

 Am. Pal. Foss., p. 308, Marshall Gr. in 

 Southern Michigan. Proposed instead 

 of O. occidentale, Winchell, 1862, Arn. 

 Jour. Sci. and Arts, 2d ser., vol. 33, p. 

 356, which was preoccupied by Swallow. 



vindobonense, Dawson, 1868, Acad. Geol., 

 p. 311, Carboniferous. 



virgatum, Sowerby, 1839, Murch. Sil. Sys., 

 p. 632, and Pal. N. Y., vol. 2, p. 291, 

 Niagara Gr. 



virgulatum, Hall, 1852, Pal. N. Y., vol. 2, 

 p. 96, Clinton and Niagara Grs. 



vittatum, Sandberger. Not American. 



vulgatum, Billings, 1857, Rep. of Progr. 

 Geo. Sur. Can., p. 337, Trenton Gr. 



warrenense n. sp., Chemung Gr. Pro- 

 posed instead of 0. cochleatum, Hall, 

 Pal. N. Y., vol. 5, p. 308, pi. cxiii, fig. 

 19, which name was preoccupied. 



wauwatosense, Whitfield, 1880, Ann. Rep. 

 Geo. Sur. Wis., p. 66, and Geo. Wis., 

 vol. 4, p. 297, Niagara Gr. 



whitii, Winchell, 1863, Proc. Acad. Nat. 

 Sci., p. 22, Kinderhook Gr. 



winchelli, Meek & Worthen, 1866, Proc. 

 Acad. Nat. Sci. Phil., p. 257, and Geo. 

 Sur. 111., vol. 6, p. 512, Ham. Gr. 



woodworthi, McChesney, 1865, New Pal. 

 Foss., p. 53, Niagara Gr. Proposed in- 

 stead of O. irregulare, which was preoc- 

 cupied. 



xerxes, Billings, 1865, Pal. Foss., vol. l,p. 

 316, Quebec Gr. 



xiphias, Billings, 1857, Rep. of Progr. 

 Geo. Sur. Can., p. 318, Trenton Gr. 



zeus, Hall, 1879, Pal. N. Y., vol. 5, pt. 2, p. 



235, Schoharie grit. 



PETALICHNUS, S. A. Miller, 1880, Jour. Gin. 

 Soc. Nat. Hist., vol. 2, p. 221. [Ety. pe- 

 talos, spread out ; ichnos, traok.] A wide 

 trail composed of numerous trans- 

 versely elongated depressions arranged 

 without order. Type P. multipartitus. 



multipartitus, S. A. Miller, 1880, Jour. 

 Gin. Soc. Nat. Hist., vol. 2, p. 222 Utica 

 Slate Gr. 



PHRAGMOCERAS, Broderip, 1839, Murch. Sil. 

 Syst., p. 621. [Ety. phragmos, partition ; 

 keras, horn.] Shell short, arched, com- 

 ' pressed, more 

 or less conical ; 

 sides of the 

 mouth lapping 

 toward each 

 other ; septa 

 simple, crossed 

 by the sig- 

 moidal lines of 

 growth jsiphun- 

 cle on the in- 

 ternal edge, di- 

 late between 

 the septa. Type 

 P. arcuatum. 



byronense, Wor- FIG. 756. Phragmoceras 

 then, 1875 hector. Cast of Interior. 

 Geo. Sur. 111., vol. 6, p. 506, Niag- 

 ara Gr. 



