BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 415 



DICRANELLA Ulrich. Genotype: D. bicornis Ulrich. 



Dicraiiella Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 664; Zittel-Eastman Textb. 

 Pal., 1, 1900, p. 644. Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 

 349. Bassler, Zittel-Eastman Textb. Pal., 2d ed., 1913, p. 738. 



Dicranella bicornis Ulrich. 



Dicranella bicornis Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 665, pi. 44, fig. 26; 

 pi. 46, figs. 39, 40. Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 349, 

 fig. 1657, j, k. Bassler, Zittel-Eastman Textb. Pal., 1913, p. 738, fig. 1425d. 



Beyrichia bicornis Miller, N. A. Geol. Pal., 2d App., 1897, p. 787 (gen. ref.). 



Black River (Decorah): Minneapolis and St. Paul, Minnesota. 



Cotypes.Cait. No. 41366, U.S.N.M. 



Dicranella? byrnesi (Miller). 



Leperditla Byrnesi Miller, Cincinnati Quart. Jour. Sci., 1, 1874, p. 123, fig. 10; 



N. A. Geol. Pal., 1889, p. 552, fig. 1020. 

 JSchmina Byrnesi Jones, Quart. Jour. Geol. Soc. London, 46, 1890, p. 12, pi. 3, figs. 



9-11. 



Dicranella? byrnesi Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 664. 

 Eden (Fulton): Cincinnati, Ohio, and vicinity. 



Dicranella marginata Ulrich. 



Dicranella marginata Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 666, pi. 44, figs. 



27,28. 



Beyrichia marginata Miller, N. A. Geol. Pal., 2d App., 1897, p. 786 (gen. ref.). 

 Black River (Decorah): Fountain, Minnesota. 

 Holotype.Czt. No. 41368, U.S.N.M. 



Dicranella? simplex Ulrich. 



Dicranella? simplex Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 666, pi. 44, figs. 24, 



25; pi. 46, fig. 42. 



Beyrichia simplex Miller, N. A. Geol. Pal., 2d App., 1897, p. 787 (gen. ref.). 

 Black River (Decorah): Fountain, Minnesota. 

 Holotype.C&t. No. 41367, U.S.N.M. 



Dicranella spinosa Ulrich. 



Dicranella spinosa Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 665, pi. 44, fig. 23; 



pi. 46, fig. 41. 



Beyrichia spinosa Miller, N. A. Geol. Pal., 2d App., 1897, p. 787 (gen. ref.). 

 Black River (Decorah): Minneapolis, Minnesota. 

 Holotype. Cat. No. 41369, U.S.N.M. 



DICRANISCUS Meek. See Triplecia Hall. 



DICRANOGRAPTUS Hall. Genotype: Graptolithus ramosus Hall. 



Dicranograptus Hall, Can. Org. Remains, dec. 2, 1865, p. 112; 20th Rep. New York 

 State Cab. Hist., 1868, p. 218; rev. ed., 1870, p. 252. Carruthers, Geol. Mag., 

 5, 1868, p. 73, 132. Hopkinson, Geol. Mag., 7, 1870, p. 353. Richter, Zeits. 

 d. d. geol. Gesell, 27, 1875, p. 266. Zittel, Handb. Pal., 1, 1879, p. 300. 

 Tullberg, Sveriges Geol. Unders., ser. C, No. 55, 1883, pp. 12, 14. Spencer, 

 Trans. Acad. Sci. St. Louis, 4, 1884, p. 562. Miller, N. A. Geol. Pal., 1889, 

 p. 185. James, Jour. Cincinnati Soc. Nat. Hist., 14, pt. 2, 1892, p. 160. 

 Gurley, Jour. Geol., 4, 1896, p. 71. Wiman, Bull. Geol. Inst. Univ. Upsala, 

 2, pt. 2, 1896, p. 264. Koken, Die Leitfossilien, Leipzig, 1896, p. 329. 

 Roemer and Freeh, Leth. geog., Leth. Pal., 1897, p. 615.; Zittel-Eastman 



