BIBLIOGEAPHIC LIST OF GENERA AND SPECIES. 417 



DicRANOGRAPTUs NicHOLSoNi Frech. See Dicranograptiis fiircatus. 



DicRANOGRAPTUs NICHOLSONI ARKANSASENSis Gurley. See Dicrauograptus ramosus 

 arkansasensis. 



Dlcranograptus iiicholsonl diapason Gurley. 



Picranograptus nicholsoni var. diapason Gurley, Jour. Geol.. 4, 1896, p. 73. — 



Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, pp. 322-324, pi. 21, 



figs. 3-5, figs. 249-254. 

 Chazyan (Normanskill): Glenmont, Stockport, etc., New York; Arkansas. 

 Cotype.— Cat. No. 54286, U.S.N.M. 



Dicranograptus nicholsoni parvangulus Gurley. 



Dicranograptus nicholsoni var. parvangulus Gurley, Ann. Rep. Geol. Surv. 



Arkansas, 3, 1892, p. 417; Jour. Geol., 4, 1896, p. 73.— Ruedemann, Bull. 



New York State Mus.. 11, pt. 2, 1908, pp. 320-322, pi. 21, fig. 2, figs. 243-248. 

 Chazyan (Normanskill): Mount Moreno, Glenmont, Stockport, etc.. New York; 



Arkansas. 

 Cotypes.—Qsii. Nos. 54257, 54258, U.S.N.M. 



Dicranograptus nicholsoni parvulus Ruedemann. 



Dicranograptus nicholsoni var. i)arvulu8 Ruedemann, Bull. New York State Mus., 



162, 1912, p. 78. figs. 17, 18. 

 Trenton (Canajoharie): Near Pat tersonville, New York. 



Dicranograptus nicholsoni whitianus (Miller). 



Graptolithus (Climacograptus) ramulus White (preoccupied), Wheeler's Expl. 



Surv. West 100th Merid., 4, pt. 1, 1877, p. 62, pi. 4, figs. 3a-c. 

 Graptolithus whitianus Miller, Amer. Pal. Foss., 2d ed., 1883, p. 269. 

 Dicranograptus nicholsoni var. whitianus Gurley, Jour. Geol., 4, 1896, p. 72, 



300.— Ruedemann, Mem. New Y^ork State Mus., 11, pt. 2, 1908, p. 324. 

 Chazyan (Normanskill zone): Five miles north of Summit, Nevada. 

 Holotype.—C&t. No. 8555, U.S.N.M. 



DicKANOGRAPTUs RAMOSUS Hopkinson. See Dicranograptus spinifer. 



Dicranograptus ramosus (Hall). 



Graptolithus ramosus Hall, Pal. New York, 1, 1847, p. 270, pi. 73, fig. 3a-h.— 

 Salter, Geol. Soc.Quar. Jour., 5, 1848, p. 10, pi. 1, fig. 7; Geol. Stu-v. Canada, 

 dec, 1865, p. 15, fig. 20.— Chapman, Canadian Jour., 8, 1863, p. 205, text fig. 

 203.— Billings, Geol. Canada, Geol. Surv. Canada, 1863, p. 200, fig. 194. 



Graptolithus (Dicranograptiis) ramosus Hall, New York State Cab. Nat. Hist., 

 20th Ann. Rep., 1868, p. 181, fig. 21; pi. 2, figs. 18-21, p. 227; rev. ed., 1870, 

 p. 212. 



Cladograpsus ramosus Geinitz, Die Graptolithen, 1852, p. 29.— McCoy, Geol. Surv. 

 Victoria, dec. 2, 1875, pi. 20, fig. 2. 



Cladograpsus sp. undet. Emmons, Amer. Geology, 1856, pi. 1, fig. 12. 



Dicranograptus ramosus Salter, Mem. Geol. Surv. Great Britain, 3, 1866, p. 330, 

 pi. 13A, fig. 1; Siluria, 4lh ed., 1866, p. 541, fig. 4.— Nicholson, Mon. British 

 Grapt.,1872, p. 119, fig. 60.— Lapworth, Cat. West. Scot. Foss., 1876, p. 6, 

 pi. 4, fig. 80.— Whitfield, U. S. Geog. Surv. West 100th Merid., ^^^leele^'^ 

 Rep., 1877.— Walcott, Alb. Inst. Trans., 10, 1883 (Advance sheet, 1879, p. 

 34).— Lapworth, Roy. Soc. Canada Trans., 5, sec. 4, 1886, p. 184.— Ami, 

 Canadian Geol. Surv. Rep., 2dser., 3, pt. 2, 1889, p. 117K.— Miller, N. A. Geol. 

 Pal., 1889, p. 185, fig. 167.— Walcott, Bull. Geol. Soc, 1, 1890, 339. -Gurley, 

 Geol. Surv. Arkansas Ann. Rep., 3, 1892, p. 411.— James, Jour. Cincinnati 



84243"— Bull. 92—15 27 



