BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1277 



Thkcia swindernana lloemer. See Thecia minor. 



Thecia vetusta Davis. See Protaraea richrnondensis. 



Thecocystis Jaekel. See Heniicystites subgenus Cystaster Hall. 



Thecocystis sacculus Jaekel. See Hernicystites (Cystaster) granulatus. 



Thecostegites hemisphericus Roemer. See Fistulipora hemispherica. 



Thlipsura simplex Rrause. See Octonaria simplex. 



THRESHERODISCUS Foerste. Genotype: T. ramosus Foerste. 



Thresherodiscus Foerste, Bull. Sci. Lab. Denison Univ., 17, 1914, p. 432. 



Thresherodiscus ramosus Foerste. 



Thresherodiscus ramosa Foerste, Bull. Sci. Lab. Denison Univ., 17, 1914, p. 432, 



pi. 1, fig. 8, pi. 3, fig. 3. 

 Trenton (Curdsville) : Goat Island, northeast of Little Current, Manitoulin Island, 



Lake Huron. 



Thysanocrinus Hall. See Dimerocrinus Phillips. 



Thysanocrinus (Rhodocrinus) microbasilis Billings. See Archaeocrinus micro- 

 basilis. 



Thysanocrinus mllligan.e Miller and Gurley. See Gazacrinus? milligana;. 



Thysanocrinus (Rhodocrinus) pyriformis Billings. See Archaeocrinus pyri- 

 formis. 



THTSANOPTGE Kayser. Genotype: Thysanopyge argentina Kayser. 



Thysanopyge Kayser, Zeits. d. d. geol. Gesell., 50, 1898, pp. 425, 427. 



Thysanopyge argentina Kayser. 



Thysanopyge argentina Kayser, Zeits. d. d. geol. Gesell., 50, 1898, p. 425, pi. 16, 



fig. 2. 

 Middle Ordovician: Salta, Argentina. 



Tk;illites Barrois. See Scolithus Hall. 



TOLMAIA Williams. Genotype: Pterinea lineata Goldfuss. 



Tolmaia Williams, Proc. U. S. Nat. Mus., 34, 1908, p. 86. 



Tolmaia campestris Williams. 



Tolmaia campestris Williams, Proc. U. S. Nat. Mus., 45, 1913, p. 335, pi. 29, 



fig. 16. 

 Silurian (Edmunds): Field Point, west side Cobscook River, Edmunds Township, 



Washington County, Maine. 

 Holotype.—Q&t. No. 58956, U.S.N.M. 



TRACHOMATICHNUS Miller. Genotype: T. numerosus Miller. 



Trachomatichnus Miller, Jour. Cincinnati Soc. Nat. Hist., 2, 1880, p. 219; N. A. 

 Geol. Pal., 1889, p. 454. 



Trachomatichnus cincinnatensls Miller. 



Trachomatichnus cincinnatensis Miller, Jour. Cincinnati Soc. Nat. Hist., 2, 1880 



p. 220, pi. 14, fig. 3. 

 Eden (Economy): Walker Mill Road, Cincinnati, Ohio. 



