BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 9 



Acrotreta Idahoensis alta Continued. 



Canadian (Base of Pogonip): Adams Hill, Eureka County, Nevada. Also Middle 



and Upper Cambrian of Montana, Utah, and Nevada. 

 Holotype and paratype.V&t. Nos. 35273, 52099 U.S.N.M. 



ACROTRETA MINUTA Walcott. See Linnarssonella minuta. 



Acrotreta ovalis Walcott. 



Acrotreta ovalis Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 592; Mon. U. S. Geol. 



Surv., 51, 1912, p. 699, pi. 66, figs. 2, 2a-b. 

 Ozarkian? (Levis-erratic): Point Levis, Quebec. 



ACROTRETA SIPO Matthew. See Acrotreta bisecta. 



ACTINOCERAS Bronn. Genotype: A. bigsbyi Bronn. 



Actinoceras Bronn, Leth. geog., 1837, p. 97. Stokes, Proc. Geol. Sue. London, 2, 

 1838, p. 689; Trans. Geol. Soc. London, 2d ser., 5, 1840, p. 707. McCoy, 

 Syn. Char. Carb. Foss. Ireland, 1844, p. 11. D'Orbigny, Prodr. de Pal., 

 1, 1849, p. 3. Woodward, Man. Mollusca, pt. 1, 1851, p. 88, fig. 47. Sae- 

 mann, Palseontographica, 3, 1852, pp. 137, 145, 156. Pictet, Traite de 

 Pal., 2d ed., 2, 1854, p. 638. Emmons, Amer. Geology, 1, pt. 2, 1855, 

 p. 148. Barrande, Bull. Soc. Geol. France, 2d ser., 12, pt. 1, 1855, 

 p. 458; Neues Jahrb. f. Min., etc., 1855, p. 395. Woodward, Geol. Mag., 5, 

 1868, p. 133. Barrande, Syst. Sil. du Centre Boheme, 2, pt. 3, 1879, p. 760. 

 Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1883, p. 272. Zittel, Handb. Pal., 2, 

 1884, p. 368. Foord, Geol. Mag., dec. 3, 5, 1888, p. 487; Cat. Foss. Ceph. 

 Brit. Mus., 1, 1888, p. 164. Miller, N. A. Geol. Pal., 1889, p. 431. Whid- 

 borne, Mon. Dev. Fauna South England, 1, Pal. Soc., 1890, p. 119. Bather, 

 Nat. Sci., 5, 1894, pp. 431, 434, fig. 6. Clarke, Geol. Minnesota, 3, pt. 2, 1897, 

 p. 781. Hyatt, Zittel-Eastman Textb. Pal., 1, 1900, p. 528. Foord, Mon. 

 Carb. Ceph. Ireland, pt. 5, Pal., Soc., App., 1903, p. 211. Grabau and 

 Shimer, N. A. Index Fossils, 2, 1910, p. 114. Hyatt, Zittel-Eastman Textb. 

 Pal., 2ded., 1913, p. 609. 



Ormoceras. Stokes, Proc. Geol. Soc. London, 2, 1838, p. 689; Trans. Geol. Soc. 

 London, 2d ser., 5, 1840, p. 709. Woodward, Man. Mollusca, pt. 1, 1851, p. 

 88, fig. 48. Saemann, Palaeontographica, 3, 1852, pp. 146, 156. Billings, 

 Geol. Surv. Canada, Rep. Progr. for 1853-56, 1857, pp. 326, 328. Barrande, 

 Neues Jahrb. f. Min., etc., 1855, p. 400. Emmons, Amer. Geology, 1, pt. 2, 

 1855, p. 150. Barrande, Bull. Soc. Geol. France, 2d ser., 12, pt. 1, 1855, p. 

 470. Chapman, Canadian Jour., n. s., 8, 1863, p. 20; Expos. Min. Geol. 

 Canada, 1864, p. 128. Barrande, Syst. Sil. du Centre Boheme, 2, pt. 3, 1874, 

 p. 765. Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1884, p. 271. Zittel, Handb. 

 Pal., 2, 1884, p. 368. Miller, N. A. Geol. & Pal., 1889, p. 445. (Genotype: 

 O.bayfieldi Stokes). 



Paractinoceras (subgenus of Actinoceras) Hyatt, Zittel-Eastman Textb. Pal., 

 1900, p. 528 (Genotype: Sactoceras canadense Whiteaves). 



Deiroceras (subgenus of Actinoceras) Hyatt, Proc. Boston Soc. Nat. Hist., 22, 

 1884, p. 273 (Genotype: Orthoceras python Billings). 



Conotubularia Troost, Mem. Soc. Geol. France, 3, 1838, p. 87; 5th Geol. Rep. Ten- 

 nessee, 1840, p. 5. Saemann, Palseontographica, 3, 1852, p. 146. Barrande, 

 . Sil. Boheme, 2, pt. 3, 1874, p. 767. (Genotype: C. cuvierii Troost.) 



Actinoceras abnorme (Hall). 



Orthoceras abnorme Hall, 20th Rep. New York State Cab. Nat. Hist., 1868, p. 355, 

 pi. 18 (9), fig. 10; rev. ed. 1868 (1870), p. 415, pi. 18, fig. 10; pi. 25, fig. 18.- 

 Barrande, Syst. Sil. du Centre Boheme, 2, pt. 3, 1874, p. 756, pi. 456. Day, 

 Trans. Wisconsin Acad. Sci., Arts Letters, 4, 1879, p. 120. 



