418 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Dicranograptus ramosus — Continued. 



Soc. Nat. Hist., 14, 1892, p. 160.— Giirley, 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, 616, fig. 180.— T. S. Hall, Geol. Mag., n. e., dec. 

 4, 6, 1899, 445.— Ruedemann, Bull. New York State Mus., 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: MountMoreno, Kenwood, Stockport, etc.. New York; Canada; 

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

 Hartfell and Glenkiln shales of Great Britain. 



Dicranograptus ramosu.s arkausasensis (Gurley). 



Dicranograptus arkausasensis Giurley, 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 (Glenkiln). 

 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. 

 Ordo\ician: South Scotland (Glenkiln); Arkansas (Normanskill-Stringtowu). 



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, p. 

 140, pi. 7, fig. 1. 



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

 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. 



