10 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Actiiioceras abnorme Continued. 



Orthoceras (Actinoceras) abnorme Zittel, Handb. Pal., 2, 1884, p. 367, fig. 506. 

 Actinoceras abnorme Ruedemann, Bull, New York State Mus., 80, 1905, p. 332, 



fig. 22. 

 Xiagaran (Racine and Guelph): Racine, etc., Wisconsin. 



ACTINOCERAS ALLUMETTENSE Whiteaves. See Loxoceras allumettense. 



Actinoceras anticostiense (Billings). 



Orthoceras Anticostiense, Billings, Geol. Surv. Canada, Rep. Progr. for 1853-56, 



1857, p. 316; Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 1866, p. 22 (loc. 



ref.). Barrande, Syst. Sil. du Centre Boheme, 2, pt. 3, 1874, p. 731, pi. 434. 

 Richmond and Gamachian: Charleton Point, etc., Anticosti. 



Actinoceras back! (Stokes). 



Orthocerae Bigsby, Trans. Geol. Soc. London, 1, pt. 2, 1824, p. 204, pi. 30, 



fig. 1. 



Orthoceras Backii Stokes, Proc. Geol. Soc. London, 2, 1838, p. 689. 



Orthoceras nummularium Etheridge (not Sowerby), Quart. Jour. Geol. Soc. Lon- 

 don, 34, 1878, p. 608. 



Actinoceras Backi Foord, Cat. Foss. Ceph. British Mus., 1, 1888, p. 182. 



Niagaran: Drummond Island, Lake Huron; Cape Louis Napoleon, Smith Sound, 



and Bessels Bay, Kennedy Channel, Arctic America. 

 Observation. See Actinoceras rotulatum (Billings) for a possible synonym. 



Actinoceras bayfleldi (Stokes). 



Ormoceras Bayfieldii Stokes, Proc. Geol. Soc. London, 2, 1838, p. 689 (nom. nud.); 

 Trans. Geol. Soc. London, 2d ser., 5, 1840, p. 709, pi. 40, fig. 1. Woodward, 

 Man. Mollusca, pt. 1, 1851, p. 88, footnote, fig. 48. Barrande, Bull. Soc. 

 Geol. France, 2d ser., 12, 1855, p. 470, pi. A, fig. 5; Neues Jahrb. f. Min., etc., 

 1855, p. 408, pi. 6, fig. 5. Miller, N. A, Geol. Pal., 1889, p. 445, fig. 749. 



Orthoceras Bayfieldi Barrande, Syst. Sil. du Centre Boheme, 2, pt. 3, 1874, p. 738, 

 pi. 231. 



Orthoceras (Ormoceras) Bayfieldi, Zittel, Handb. Pal., 2, 1884, p. 368, fig. 507. 



Niagaran: Drummond Island, Lake Huron. 



Actinoceras beaumonti Castelnau. 



Actinoceras Beaumonti Castelnau, Essai Syst. Sil. PAmerique Septent., 1843, 



p. 32, pi. 6, fig. 1. 

 Niagaran: Drummond Island, Lake Huron. 



Actinoceras beloi tense (Whitfield). 



Orthoceras (Actinoceras) Beloitense Whitfield, Ann. Rep. Geol. Surv. Wisconsin, 



for 1877, 1878, p. 77; Geol. Wisconsin, 4, 1882, p. 226, pi. 8, fig. 1; pi. 10, figs. 



9, 10. 



Orthoceras Beloitense Chamberlin, Geol. Wisconsin, 1883, p. 159, figs. 

 Actinoceras beloitense Clarke, Geol. Minnesota, 3, pt. 2, 1897, p. 782, pi. 47, 



fig. 18. Holtedahl. Vidensk, Skrifter, 1, No. 9, 1912, p. 8, pi. 4, fig. 2. 

 Orthocerae Bigsby, Trans. Geol. Soc. London, 1, pt. 2, 1824, p. 198, pi. 25, 



fig. 3 (not 1, 2). 

 Actinoceras Bigsbyi, Stokes (part) Trans. Geol. Soc. London, 2d ser., 5, pt. 3, 1840, 



p. 707. 

 Orthoceras (Ormoceras) Backii? Meek and Worthen, Geol. Surv. Illinois, 3, 1868, 



p. 298, pi. 1, fig. 4. Barrande, Syst. Sil. Centre Boheme, 2, text 4, 1877, p. 



264, pi. 474, fig. 11. 

 Black River (Platteville): Beloit and Janesville, Wisconsin; Thessalon Island, 



Lake Huron; Arctic America. 



