1292 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Trimeres Barrande. See Trimeroceras Hyatt. 



TRIMEROCERAS Hyatt. Genotype: Gomphoceras staurostoma Barrande. 



Trimorion Barrande, Syst. Sil. Boheme, 2, pt. 1, 1867, p. 265. 

 Trimeres Barrande, Syst. Sil. Boheme, 2, pt. 1, 1867, p. 265. 

 Trimeroceras Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1883, p. 278.— Grabau and 



Shimer, N. A. Index Fossils, 2, 1910, p. 130.— Foord, Cat. Foss. Ceph. British 



Mus., 1, 1888, p. 245. 



Trimeroceras gilberti Kindle and Breger. 



Trimeroceras gilberti Kindle and Breger, 28th Ann. Rep. Dep. Geol. Nat. Res. 

 Indiana, 1904, p. 475, pi. 15, fig. 1. — Grabau and Shimer, N. A. Index Fossils, 

 2, 1910, p. 130. 

 Niagaran: Huntington and Delphi, Indiana. 

 Holotype.—G&t. No. 52950, U.S.N.M. 



TRIMEROCYSTIS Schuchert. Genotype: T. peculiaris Schuchert. 



Trimerocystis Schuchert, Smiths. Misc. Coll., 47, 1904, p. 237. 



Trimerocystis pecularis Schuchert. 



Trimerocystis pecularis Schuchert, Smiths. Misc. Coll., 47, pt. 2, 1904, p. 239, 



fig. 34, pi. 35, figs. 1-3; Maryland Geol. Surv., Low. Dev., 1913, p. 244, pi. 34, 



figs. 8-10. 

 Helderbergian (Keyser): Keyser, West Virginia. 

 Holotype.— Cat. No. 35064, U.S.N.M. 



Trimerus Green. See Homalonotus Koenig. 



Trimorion Barrande. See Trimeroceras Hyatt. 



Trinucleus Murchison. See Cryptolithus Green. 



Trinucleus caractaci Emmons. See Cryptolithus tessellatus. 



Trinucleus concentrica of authors. See Cryptolithus tessellatus. 



TRIPLECIA Hall. Genotype: Atrypa extans Emmons. 



Triplesia Hall, Pal. New York, 3, 1859, p. 522; 12th Rep. New York State Cab. 



Nat. Hist., 1859, p. 44.— Davidson, Mon. British Sil. Brach., Pal. Soc, 1869, 



p. 197.— Zittel, Handb. Pal., 1, 1880, p. 692.— Davidson, Mon. British Foss. 



Brach., 5, Sil. Suppl., Pal. Soc, 1883, p. 141.— Waagen, Pal. Indica, 13th 



ser., 1, 1884, p. 576.— Miller, N. A. Geol. Pal., 1889, p. 387.— Koken, DieLeit- 



fossilien, Leipzig, 1896, p. 235.— Schuchert, Zittel-Eastman Textb. Pal., 



1913, p. 387. 

 Triplecia Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 269.— Winchell and 



Schuchert, Geol. Minnesota, 3, 1893, p. 408.— Hall and Clarke, 11th Ann. 



Rep. New York State Geol., 1894, p. 289.— Schuchert, Zittel-Eastman 



Textb. Pal., 1, 1900, p. 315. 

 Dicraniscus Meek, Amer. Jour. Sci., 3d ser., 4, 1872, p. 279; Pal. Ohio, 1, 1873, 



p. 576. (Genotype: D. ortoni Meek.) 

 Cliftonia new subgenus of Triplecia Foerste, Bull. Sci. Lab. Denison Univ., 14, 



1909, p. 82.— Schuchert, Zittel-Eastman Textb. Pal., 1913, p. 387. (Genotype: 



C. striata Foerste.) 

 Oxoplecia Wilson, Bull. Victoria Mem. Mus., 1, 1913, p. 81. (Genotype: O. cal- 



houni Wilson.) 



Tiui'lecia? calcifera Hall and Clarke. See Syntrophia calcifera. 



