418 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dicranograptus ramosus Continued. 



Soc. Nat. Hist., 14, 1892, p. 160. Gurley, Jour. Geol., 4, 1896, p. 297. T. S. 

 Hall, Proc. Roy. Soc. Victoria, 9, 1896, pi. 1, p. 184. Roemer and Freeh, 

 Leth. geog.,Leth. Pal., 1, 1897,613, fig. 180. T. S. Hall, Geol. Mag., n. s., dec. 

 4, 6, 1899, 445. Ruedemann, Bull. New York State Mtts., 42, 1901, p. 

 496ff. T. S. Hall, Geol. Surv. Victoria Rec., 1, pt. 1, 1902, p. 33. Clark, 

 Geol. Mag. (4), 9, 1902, p. 498. Weller, Geol. Surv. New Jersey, Pal., 3, 1903, 

 p. 55, 213, pi. 16, figs. 10, 11. Elles and Wood, Mon. British Grapt., 1904, 

 p. 175, pi. 24, figs. 6a, b. Dale, Bull. U. S. Geol. Surv., 242, 1904, p. 33. 

 Grabau and Shimer, N. A. Index Fossils, 1, 1906, p. 32, fig. 52. Ruedemann, 

 Mem. New York State Mus., 11, pt. 2, pp. 325-328, pi. 23, fig. 1, text figs. 255, 

 256, 411. 



Middle Ordovician: Mount Moreno, Kenwood, Stockport, etc., New York; Canada; 

 New Jersey; Arkansas; Oklahoma (Normanskill); Victoria and Australia. 

 Hartfell and Glenkiln shales of Great Britain. 



Dicranograptus ramosus arkansasensis (Gurley). 



Dicranograptus arkansasensis Gurley, Geol. Surv. Arkansas, Ann. Rep., 3, 1892, 



p, 416, pi. 9, figs. 1, 2. 



Dicranograptus nicholsoni arkansasensis Gurley, Jour. Geol., 4, 1896, p. 72. 

 Dicranograptus ramosus var. arkansasensis Ruedemann, Mem. New York State 



Mus., 11, pt. 2, 1908, p. 329, figs. 257, 258. 



Middle Ordovician: Arkansas (Normanskill); Great Britain (Gleiikiln). 

 Cotype. Cat. No. 54261, U.S.N.M. 



DICRANOGRAPTUS RAMOSUS var. SPINIFER Elles and Wood. See Dicranograptus 

 spinifer. 



DICRANOGRAPTUS RAMULUS Herrman. See Dicranograptus nicholsoni whitianus. 



Dicranograptus rectus Hopkinson. 



Graptolithus ramosus Salter, Quart. Jour. Geol. Soc. London, 5, 1849, p. 16, pi. 1. 



fig. 7. 

 Dicranograptus rectus Hopkinson, Geol. Mag., 9, 1872, p. 508, pi. 12, fig. 10. 



Elles and Wood, Mon. British Grapt., 4, 1904, p. 169, pi. 24, figs. 4a-c. 

 Ordovician: South Scotland (Glenkiln); Arkansas (Normanskill-Stringtown). 



DICRANOGRAPTUS SEXTANS Hopkinson. See Dicellograptus sextans. 



Dicranograptus spinifer (Lapworth) Elles and Wood. 



Dicranograptus ramosus Hopkinson, Geol. Mag., 7, 1870, p. 358, pi. 16, fig. 5.- 



Lapworth, Belfast Nat. Field Club, Rep. and Proc., App., 1, pt. 4, 1877, 



140, pi. 7, fig. 1. 

 Dicranograptus ramosus var. spinifer (Lapworth MS.) Elles and Wood, Mon. Bi 



ish Grapt., pt. 4, 1904, p. 176, pi. 24, figs. 8a-c. 

 Dicranograptus spinifer Lapworth, Geol. Soc. Quart. Jour. London, 38, 1882, p. 



610. Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, pp. 330-332, 



pi. 22; pi. 23, figs. 2, 3, figs. 259-263. 

 Middle Ordovician: Great Britain (Hartfell and Glenkiln); Glenmont, Stockport, 



and Mount Moreno, New York (Normanskill). 



/ 

 Dicranograptus spinifer geniculatus Ruedemann. 



Dicranograptus spinifer var. geniculatus Ruedemann, Bull. New York State Mus., 



11, pt. 2, 1908, pp. 333, 334, pi. 23, figs. 4-6, text figs. 265-267. 

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



