BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 1277 



THECIA SWINDERNANA Roemer. See Thecia minor. 

 THECIA VETUSTA Davis. See Protaraea richmondensis. 

 THECOCYSTIS Jaekel. See Hemicystites subgenus Cystaster Hall. 

 THECOCYSTIS SACCULUS Jaekel. See Hemicystites (Cystaster) granulatus. 

 THECOSTEGITES HEMISPHERICUS Roemer. See Fistulipora hemispherica. 

 THLIPSURA SIMPLEX Krause. 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 Archseocrinus micro- 

 basilis. 



THYSANOCRINUS MILLIGAN^E Miller and Gurley. See Gazacrinus? milliganse. 



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. 



TIGILLITES Barrois. See Scolithus Hall. 



TOLMAIA Williams. Genotype: Pterinea lineata Goldfuss. 



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



Tolmaia campestrls 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.C&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 cincinnatensis Miller. 



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



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

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



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