BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 901 



Orthoceras arcticum Foorde. 



Cyrtoceras sp. Etheridge, Quart. Jour. Geol. Soc. London, 34, 1878, p. 608. 

 Orthoceras arcticum Foord, Cat. Foss. Ceph. British Mus., 1, 1888, p. 38* fig. 3. 

 Niagaran: Offley Island, Kennedy Channel, Arctic America. 



Orthoceras arcuolineatum Ruedemann. 



Orthoceras arcuolineatum Buedemann, Bull. New York State Mus., 162, 1912, 



pi. 8, figs. 1, 2. 

 Trenton (Canajoharie): Fort Edward, New York. 



Orthoceras arcuoliratum Hall. 



Orthoceras arcuoliratum Hall, Pal. New York, 1, 1847, p. 198, pi. 42, figa. 7a-c. - 

 Emmons, Amer. Geology, 1, pt. 2, 1855, p. 149, pi. 12, fig. 4. Foord, Cat. 

 Foss. Ceph. British Mus., 1, 1888, p. 10. Keyes, Missouri Geol. Surv., 5, for 

 1894, 1895, p. 227. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 542, 



% 

 Trenton: Middleville and Watertown, New York. 



ORTHOCERAS ATLANTICUM Barrande. See Endoceras atlanticum. 



Orthoceras atticus Billings. 



Orthoceras Atticus Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 312. 

 Canadian (Beekmantown): Stanbridge, Quebec. 



Orthoceras autolycus Billings. 



Orthoceras Autolycus Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 91, 



(adv. sheets, 1862.) 

 Ozarkian? (Levis erratics): Point Levis, Quebec. 



ORTHOCERAS (ORMOCERAS) BACKH Barrande. See Actinoceras beloitense and A. 

 whitei. 



ORTHOCERAS BALTEATUM Billings. See Spyroceras balteatum. 

 ORTHOCERAS BARTONENSIS Spencer. See Dawsonoceras annulatum. 

 ORTHOCERAS (ORMOCERAS) BAYFIELDI Zittel. See Actinoceras (Ormoceras) bayfieldi. 

 ORTHOCERAS BEAUPORTENSE Whiteaves. See Syprocerasbeauportense. 



Orthoceras beck! Billings. 



Orthoceras becki Billings, Canadian Nat. Geol., 4, 1859, p. 362, fig. lla; Geol. 

 Canada, Geol. Surv. Canada, 1863, p. 121, fig. 35. Lesley, Geol. Surv. 

 Pennsylvania, Rep. P. 4, 1889, p. 543, fig. 

 Canadian (Romaine): Mingan Islands, Quebec. 



ORTHOCERAS BELLATULUM Billings. See Kionoceras bellatulum. 



ORTHOCERAS (ACTINOCERAS) BELOITENSE Whitfield. See Actinoceras beloitense. 



Orthoceras beltrami Clarke. 



Orthoceras beltramii Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 789, pi. 55, fig. 10. 

 Trenton (Prosser) : Wykoff , Minnesota. 



ORTHOCERAS (ACTINOCERAS) BIGSBYI of authors. See Actinoceras bigsbyi and A. 

 beloitense. 



ORTHOCERAS BILINEATUM Whitfield. See Protocycloceras whitfieldi. 

 ORTHOCERAS BILINEATUM Clarke. See Spyroceras bilineatum. 



