BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 415 



DICRANELLA Ulrich. Genotype: D. bicomis Ulrich. 



Dicranella Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 664; Ziltel-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 blcornis 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., J913, 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.— Cat. No. 41366, U.S.N.M. 



Dicranella? byrnesi (Miller). 



Leperditia Byrnesi Miller, Cincinnati Quart. Jour. Sci., I, 1874, p. 123, fig. 10; 



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

 ^chmina Byrnesi Jones, Quart. Jour. Geol. Soc. London, 46, 1890, ]>. 12, pi. 3, figs. 



9-11. 

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

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



Dicranella marglnata Ulrich. 



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



27,28. 

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

 Black River (Decorah): Fountain, Minnesota. 

 Eolotype.— Cat. 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. 

 Eolotype.— Cat. 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, j). 787 (gen. ref.). 

 Black River (Decorah): Minneapolis, Minnesota. 

 Eolotype.— Gat. No. 41369, U.S.N.M. 



DicRANiscus Meek. See Triplecia Hall. 



DICRANOGRAPTUS Hall. Genotype: Graptolithue ramosus Hall. 



DicranograptusHall, 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 



