BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 417 



DICRANOGRAPTUS NICHOLSONI Freeh. See Dicranognptufl furcatus. 



DICRANOC.RAPTUS MciioLsoNi ARKANSASENSis Gurley. See Dicranograptus ramostis 

 arkansasensis. 



Dicranograplus nicholsoni diapason Gurley. 



Dicranograptus 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.^B.t. Nos. 54257, 54258, U.S.N.M. 



Dicranograptus nicholsoni parvulus Ruedemann. 



Dicranograptus nicholsoni var. parvulus Ruedemann, Bull. New York State Mus., 



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

 Trenton (Canajoharie): Near Patterson ville, New York. 



Dicranograptus nicholsoni whitianus (Miller). 



Graptolithus (Climacograptus) ramnlus 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 York State Mus., 11, pt. 2, 1908, p. 324. 

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

 Holotype.Cat. No. 8555, U.S.N.M. 



DICRANOGRAPTUS 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. 16, pi. 1, fig. 7; Geol. Surv. 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 (Dicranograptus) 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. 1]A, fig. 1; Siluria, 4th 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., Wheeler 's 

 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., 2d ser., 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. 9215 27 



