10 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Actinoceras abuorme — 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. 

 Niagaran (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. Siirv. 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 bayfieldi (Stokes). 



C)rmoceras 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 Cenlre Boheme, 2, pt. 3, 1874, p. 738, 

 pi. 231. 



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



Niagaran: Drummond Island, Lake Huron. 



Actinoceras beaumonti Castelnau. 



Actinoceras Beaumonti Castelnau, E.>^.sai Syst. Sil. I'Amerique Septent., 1843, 



p. 32, pl. 0, fig. 1. 

 Niagaran: Drummond Island, Lake Huron. 



Actinoceras beloi tense (WTiitfield). 

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



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



9, 10. 

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

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



fig. 18.— Holtedahl. Vidensk, Skrilter, 1, No. 9, 1912, p. 8, pl. 4, fig. 2. 

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



fig. 3 (not], 2). 

 Actinoceras Bigsbja, 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, pl. 1, fig. 4.— Barrande, Syst. Sil. Centre Boheme, 2, text 4, 1877, p. 



264, pl. 474, fig. 11. 

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



Lake Huron; Arctic America. 



