BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 411 



Dicellograptus divaricatus salopiensls Elles and Wood. 



Dicellograptus divaricatus var. ealopiensis Elles and Wood, Mon. British Grapt., 

 pt. 4, 1904, p. 145, pi. 20, figs. 7a-e. Ruedemann, Bull. New York State 

 Mus., 11, pt. 2, 1908, p. 300, pi. 18, fig. 5, text figs. 217-219. 

 Ordovician: Shropshire, England, and South Scotland (Glenkiln); Stockportand 

 Kenwood, New York (Normanskill). 



DICELLOGRAPTUS ELEQANS Gurley. See Dicellograptus divaricatus bicurvatus. 



Dicellograptus gurleyi Lapworth. 



Dicellograptus gurleyi (Lapworth MSS) Gurley, Jour. Geol., 4, 1896, p. 70. 



Ruedemann, Bull. New York State Mus., 11, pt. 2, 1908, pp. 303-306, pi. 19, 



figs. 7-9, text figs. 223-228. 

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



Arkansas (Stringtown). 

 Pleviotype.C&t. No. 54265, U.S.N.M. 



Dicellograptus intortus Lapworth. 



Dicellograptus intortus Lapworth, Ann. and Mag. Nat. Hist., 5th ser., 5, 1880, p. 

 161, pi. 5, fig. 19a. Clark, Geol. Mag., 4th eer., 9, 1902, p. 498. Elles and 

 Wood, Mon. British Grapt., pt. 4, 1904, p. 146, figs. 90a, b, pi. 20, figs, a-f. 

 Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, pp. 302, 303, figs. 

 221, 222; pi. 18, figs. 9-10. 



Dicellograpsus intortus Gurley, Jour. Geol., 4, 1896, p. 95. 



Dicellograptus intortus polythecatus Gurley, Jour. Geol., 4, 1896, p. 70. 



Ordovician: Great Britain (Glenkiln); Stockport and Speigletown, New York; 

 Arkansas (Normanskill). 



DICELLOGRAPTUS INTORTUS POLYTHECATUS Gurley. See Dicellograptus intortus. 



Dicellograptus inensurans Ruedemann. 



Dicellograptus mensurans Ruedemann, Mem. New York State Mus., 11, 1908, pt. 



2, pp. 295, 296, pi. 18, fig. 2, text figs. 210, 211. 

 Chazyan: Kenwood, New York (Normanskill); Alabama (Athens). 



Dicellograptus moffatensis alabameusis Ruedemann. 



Dicellograptus moffatensis var. alabamensis Ruedemann, Mem. New York State 



Mus., 11, pt. 2, 1908, pp. 310-312, pi. 20, figs. 1, 2, text figs. 234-236. 

 Chazyan (Athens): Near Pratt's Ferry, Bibb County, Alabama. 



DICELLOGRAPTUS MOFFATENSIS var. DIVARICATUS Ami. See Dicellograptus divari- 

 catus. 



DICELLOGRAPTUS MOFFATENSIS var. DIVARICATUS Lapworth. See Dicellograptus 

 divaricatus rigidus. 



DICELLOGRAPTUS RIGIDUS Gurley. See Dicellograptus divaricatus rigidus. 



Dicellograptus sextans (Hall). 



Graptolithus sextans Hall, Pal. New York, 1, 1847, p. 273, pi. 74, fig. 3. Salter, 

 Quar. Jour. Geol. Soc., 5, 1849, p. 17, pi. 1, fig. 10. Chapman, Canadian Jour., 

 n. s., 1, 1856, p. 389, fig. 2. Carruthers, Siluria, 4th ed., 1867, p. 61, fig. 8. 

 Hall, 20th Rep. New York State Cab. Hist., 1868, pp. 180, 227; rev. ed., 1870, 

 pp. 212, 224. Nicholson, Quar. Jour. Geol. Soc., 24, 1868, p. 134. 



Diplograptus? sextans McCoy, British Pal. FOBS., 1855, p. 9. 



Didymograptus sextans Nicholson, Ann. Mag. Nat. Hist., 4th ser., 5, 1870, p. 354, 

 pi. 9, fig. 9. 



