CYR.J 



CEPHALOPODA. 



435 



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



p. 191, Quebec Gr. 

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



Nat, Hist., p. 72, and Illust. Devon. Foss., 



pi. 46, Up. Held. Gr. 

 microscopicum, Dwight, 1884, Am. Jour. 



Sci. and Arts, 3d ser., vol. 27, p. 256, 



Calciferous Gr. 

 missisquoi, Billings, 1865, Pal. Foss., vol. 



1, p. 314, (Orthoceras missisquoi,) Que- 

 bec Gr. 

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



Nat. Hist., p. 71, and Pal. N. Y., vol. 5, 



pt. 2, p. 367, Up. Held. Gr. 

 multicameratum, Hall, 1847, Pal. N. Y., 



vol. 1, p. 195, Black Riv. and Trenton Gr. 

 myrice, Hall & Whitfield, 1875, Ohio Pal., 



vol. 2, p. 149, Niagara Gr. 

 neleus, Hall, 1861, Rep. of Progr. Wis., p. 



40, Chazy and Black Riv. Grs. 

 nevadense, Walcott, 1885, Monogr. U. S. 



Geo. Sur., vol. 8, p. 203, Devonian. 

 obscurum, S. A. Miller, changed to magis- 



ter because obscurum was preoccupied, 

 ohioense, Meek, 1871, Proc. Acad. Nat. 



Sci. Phil., p. 86, and Ohio Pal., vol. 1, 



p. 229, Up. Held. Gr. 

 olenus, Hall, 1877, syn. for Trochoceras 



orion. 

 opimum, Keyes, 1888, Proc. Acad. Nat. 



Sci. Phil., pi. xii., fig. 5, Ham. Gr. 

 orcas, see Oncoceras orcas. 

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



p. 177, Niagara Gr. 

 orion, see Trochoceras orion. 

 erodes, Billings, 1862, Pal. Foss., vol. 1, 



p. 162, Guelph Gr. 

 planidorsatum, Whitfield, 1880, Ann. Rep. 



Geo. Sur. Wis., p. 57, and Geo. Wis., 



vol. 4, p. 231, Trenton Gr. 

 postumius, Billings, 1865, Pal. Foss., vol. 



1, p. 178, Hud. Riv. Gr. 

 pusillum, Hall, 1867, 20th Rep. N. Y. 



Mus. Nat. Hist., p. 407, Niagara Gr. 

 raei, Whitfield, 1889, Bull. Am. Mus. Nat. 



Hist., vol. 2, p. 58, Calciferous Gr. 

 rectum, Whitfield, 1880, Ann. Rep. Geo. 



Sur. Wis., p. 85, and Geo. Wis., vol. 4, 



p. 319, Niagara Gr. 

 regulare, Billings, 1857, Rep. of Progr. 



Geo. Sur. Can., p. 314, Black Riv. and 



Trenton Grs. 

 reversum, Spencer, 1884, Bull. No. 1, Mus. 



Univ. St. Mo., p. 60, Niagara Gr. 

 rigidum, Hall, 1867, 20th Rep. N. Y. 



Mus. Nat. Hist., p. 408, Niagara Gr. 

 rockfordense, Winchell, 1865, Proc. 



Acad. Nat. Sci., p. 132, Kinder- 

 hook Gr. 



septoris, see Gomphoceras septore. 

 simplex, Billings, 1857, Rep. of 



Progr. Geo. Sur. Can., p. 313, 



Black Riv. and Trenton Grs. 

 sinuatum, Billings, 1857, Rep. of 



Progr. Geo. Sur. Can., p. 314, 



Black Riv. Gr. 

 spinosum, see Gyroceras spinosum. 

 stonense, Safford, 1869, Geo. of Tenn., p 



290, Trenton Gr. 



subannulatum, D'Orbigny, 1850, Prodr. 

 de Pal., t. 1, p. 1, Black Riv. and Tren- 

 ton Grs. Proposed instead of C. annu- 

 latum, Hall, 1847, which was preoccu- 

 pied. 



subarcuatum, D'Orbigny, 1850, Prodr. de 

 Pal., t. 1, p. 2, Trenton Gr. Proposed 

 instead of C. arcuatum, Hall, 1847, 

 which was preoccupied. 



eubcancellatum, Hall, 1877, 1st Ed. Am. 

 Pal. Foss., p. 243, Niagara Gr. Proposed 

 instead of C. cancellatum, Hall, 1852, 

 which was preoccupied. 



subcompressum, Beecher, 1888, Pal. N. Y., 

 vol. 7, p. 35, Clinton Gr. 



subrectuni, Hall, 1859, Pal. N. Y., vol. 3, 

 p. 342, Low. Hel4. Gr. 



subturbinatum, Billings, 1857, Rep. of 

 Progr. Geo. Sur. Can., p. 312, Chazy and 

 Black Riv. Grs. 



surgens, Barrande, 1870, Syst. Sil. de 

 Boh., vol. 2, p. viii, pi. 431, Quebec Gr. 



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

 p. 194, Quebec Gr. This species is the 

 type of Eremoceras, by Hyatt. 



tenuiseptum, Faber, 1886, Jour. Cin. Soc. 

 Nat. Hist., vol. 9, p. 18, Hud. Riv. Gr. 



tenuistriatum, Hall, 1877, 1st Ed. Am. Pal. 

 Foss., p. 243. Proposed instead of C. 

 corniculum, Hall, 1862, which was pre- 

 occupied. Trenton Gr. 



tessellatum, DeKoninck. Not American. 



transversum, see Gyroceras transversum. 



trentonense, Emmons, 1842, (Orthoceras 

 trentonensis,) Geo. Rep. N. Y., p. 396, 

 Trenton Gr. 



trivolvi, see Gyroceras trivolve. 



typicum, see Cyrtocerina typica. 



undulatum, Hall, 1876, see C. alternatum. 



undulatum, Vanuxem, see Gyroceras un- 

 dulatum. 



unicorne, Winchell, 

 1863, Proc. Acad. 

 Nat. Sci., p. 23, Mar- 

 shall Gr. 



vallandighami, S. A. 

 Miller, 1874, Cin. 

 Quar. Jour. Sci., vol. FIG. 730.-Cyrtoceras 

 1, p. 232, Hud. Riv. vallandighami. 

 Gr. 



vassarinum, Dwight, 1884, Am. Jour. Sci. 

 and Arts., 3d ser., vol. 27, p. 254, Cal- 

 ciferous Gr. 



FIG. 731. Cyrtoceras ventricosum. 



ventricosura,S. A. Miller, 1875, Cin. Quar." 

 Jour. Sci., vol. 2, p. 131, Hud. Riv. Gr. 



