1274 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



THAMNISCUS King. Genotype: Ceratophytes dubius Schlotheim. 



Thamniscus King, Ann. Mag. Nat. Hist., 2d ser., 2, 1849, p. 389; Perm. Fobs. 

 England, 1850, p. 44.— Pictet, Traite de Pal., 2d ed., 4, 1857, p. 168.— Eich- 

 wald, Leth. Rossica, 1, 1860, p. 386.— Vine, Proc. Geol. Assoc, 4, 1875, p. 120; 

 Geol. Mag., dec. 2, 7, 1880, p. 507; Rep. 50th Meeting British Assoc. Adv. 

 Sci., 1880, p. 81— Shrubsole, Quart. Jour. Geol. Soc. London, 38, 1882, p. 

 343 _Vine, Proc. Yorkshire Geol. and Polyt. Soc, n. s., 8, 1884, p. 170; Rep. 

 53d Meeting British Assoc. Adv. Sci., 1884, p. 195; Proc. Yorkshire Polyt. 

 Soc, 9, 1885, p. 89.— Waagen and Pichl, Pal. Indica, 13th ser., 1885, p. 807:— 

 Ulrich, Contr. Amer. Pal., 1, 1886, p. 5.— Hall and Simpson, Pal. New York, 6, 



1887, p. 22.— Miller, N. A. Geol. Pal., 1889, p. 327.— Ulrich, Geol. Surv. Illinois, 

 7, 1890, pp. 397, 606; Zittel's Textb. Pal. (Eng. ed.), 1896, p. 283.— Simp- 

 son, 14th Ann. Rep. State Geol. New York, for 1894, 1897, p. 524.— Nickles 

 and Bassler, Bull. U. S. Geol. Surv., 173, 1900, p. 40.— Condra, Nebraska Geol. 

 Surv., 2, pt. 1, 1903, p. 82.— Cumings, Amer. Jour. Sci., 17, 1904, p. 73.— 

 Hennig, Archiv. fur Zool., Sven. Vet. Akad. Stockholm, 3, No. 10, 1906, p. 

 15— Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 53; Zittel-Eastman Textb. 

 Pal., 1913, p. 341. 



Thamniscus dichotomus (Hall). 



Hornera? dichotoma Hall, Pal. New York, 2, 1852, p. 163, pi. 40C, fig. 3d (not figs. 

 3a, b). 



Subretepora dichotoma Miller, N. A. Geol. Pal., 1889, p. 326. 



Stictopora dichotoma Whitfield and Hovey, Bull. Amer. Mus. Nat. Hist., 11, pt. 2, 

 1899, p. 108. 



Thamniscus dichotomus Ulrich, Geol. Surv. Illinois, 8, 1890, p. 607. — Bassler, 

 Bull. U. S. Geol. Surv., 292, 1906, p. 54, pi. 18, figs. 17-19; pi. 27, figs. 1-7. 



Clinton (Rochester): Lockport, Rochester, etc., New York; Grimsby and Hamil- 

 ton, Ontario. 



Plesioty pes. —Cat. Nos. 35558, 35751, U.S.N.M. 



Thamniscus niagarensis Hall. See Pseudohornera niagarensis. 



Thamniscus regularis Ulrich and Bassler. 



Thamniscus regularis Ulrich and Bassler, Maryland Geol. Surv., Low. Dev., 1913, 



p. 286, pi. 47, figs. 4-6. 

 Helderbergian (Keyser): Devils Backbone, near Cumberland, Maryland. 

 Cotypes.— Cat. No. 60741, U.S.N.M. 



Thamniscus striatopora (Billings). 



Helopora striatopora Billings, Cat. Sil. Foss. Anticosti, 1866, p. 39. . 

 Nematopora striatopora Ulrich, Geol. Surv. Illinois, 8, 1890, p. 645; Amer. Geol., 1, 



1888, p. 232, footnote. 



Anticostian (Jupiter River): Southwest Point, Anticosti. 



Thamnocella Simpson. See Pseudohornera Roemer. 



THAMNOGRAPTUS Hall. Genotype: T. typus Hall=T. capillaris Hall. 



Thamnograptus Hall, Pal. New York, 3, 1859, p. 519; 13th Rep. New York State 



Cab. Nat. Hist., 1860, p. 62; Geol. Surv. Canada, dec. 2, 1865, p. 141; 20th Rep. 



New York State Cab. Hist., 1868, p. 218; rev. ed., p. 252.— Nicholson, Ann. 



Mag. Nat. Hist., 4th ser., 16, 1875, p. 270.— Zittel, Handb. Pal., 1, 1879, p. 



290.— Spencer, Bull. Mus. Univ. State Missouri, 1, 1884, p. 39; Trans. Acad. 



Sci. St. Louis, 4, 1884, p. 563, 589.— Miller, N. A. Geol. Pal., 1889, p. 207.— 



Pocta, Syst. Sil. Centre Boheme, 8, pt, 1, 1894, p. 165.— Elles and Wood, Mon. 



British Grapt., Pal. Soc, 1903, p. 41.— Ruedemann, Mem. New York State 



Mus., 11, pt. 2, 1908, p. 204. 

 Thamuograpsus Nicholson, Mon. British Grapt., 1872, p. 130. 



