1266 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Tetradium minus Safford. 



Tetrad ium minus Safford, Amer. Jour. Sci. Arts, 2d ser., 22, 1856, p. 238. 

 Tetradium fibratum var. minus Safford, Geol. Tennessee, 1869, p. 535. 

 Trenton (Hermitage): Various localities in central Tennessee. 



Tetradium minus of authors. See Tetradium approximatum . 



Tetradium Ontario Hall. Not recognized. 



Tetradium Ontario Hall, 35th Rep. New York State Mus. Nat. Hist., 1884, pi. 16, 



%. 9. 

 Clinton: Shore of Lake Ontario. 



Tetradium peachxi Nicholson and Etheridge. See Solenopora compacta. 



Tetradium peachh var. canadense Foord. See Solenopora compacta. 



Tetradium racemosum Raymond. 



Tetradium racemosum Raymond, Bull. Victoria Memorial Mus., 1, 1913, p. 50, 



pi. 6, fig. 2. 

 Trenton: Near Ottawa, Ontario. 



Tetradium syringoporoides Ulrich. 



Tetradium sp. Bassler, Bull. Virginia Geol. Surv., 2a, 1909, pi. 4, fig. 2. 

 Tetradium syringoporoides Ulrich, in Stose, Folio U. S. Geol. Surv., 170, 1910, 



p. 58. 

 Stones River: Pennsylvania, Maryland, Virginia, etc. 



Tetragonis Eichwald. See Ischadites Murchison. 



Tetragrapsus of authors. See Tetragraptus Salter. 



Tetragrapsus bryonoides Salter. See Tetragraptus serra. 



TETRAGRAPTUS Salter. Genotype: T. crucialis Salter. 



Tetragrapsus Salter, Quart. Jour. Geol. Soc. London, 19, 1863, pp. 136, 140, figs. 

 8a, b .— Nicholson, Quart. Jour. Geol. Soc. London, 24, 1868, p. 9, 130; Mon. 

 British Grapt., p. 105, fig. 49. 



Tetragraptus Hall, 20th Rep. New York State Cab. Hist., 1868, p. 217; rev. ed. 

 (1870), p. 251.— Zittel, Handb. Pal., 1, 1879, p. 298.— Tullberg, Sveriges 

 Geol. Unders., Ser.C, No. 55, 1883, p. 12.— Hermann, Geol. Mag., dec. 3, 3, 

 1886, p. 18.— Barrois, Ann. Soc. geol. du Nord., 21, Lille, 1893, p. 108 — 

 Nicholson and Marr, Geol. Mag., dec. 4, 2, 1895, pp. 530-537, figs. — Holm, 

 Geol. Mag., dec. 4, 2, 1895, pp. 433-484; Sveriges Geol. Unders., Ser.C, No. 

 150, 1895, p. 23; Geol. Foren Stockholm Forhandl., 17, 1895, p. 339— Wiman, 

 Bull. Geol. Inst., Univ. Upsala., 2, pt. 2, 1896, p. 265.— Koken, Die Leitfos- 

 silien, Leipzig, 1896, p. 328.— Wiman, Nat. Sci., 9, 1896, p. 191.— Walther, 

 Zeits. d. d. geol. Gesell., 49, 1897, p. 256. — Roemer and Freeh, Leth. geog., 1 

 Theil, Leth. Pal., 1, 3 Lief, 1897, p. 600.— Ruedemann, Amer. Nat., 32, 1898, 

 p. 5; Zittel-Eastman Textb. Pal., 1, 1900, p. 118.— Files and Wood, Mon. 

 British Grapt., Pal. Soc, 1902, p. 55. — Ruedemann, Mem. New York State 

 Mus., 7, 1904, pp. 642-644.— Grabau and Shinier, N. A. Index Fossils, 1, 

 1906, p. 29.— Ruedemann, Zittel-Eastman Textb. Pal., 2ded., 1913, p. 129. 



Etagraptus (subgenus of Tetragraptus) Ruedemann, Mem. New York State Mus., 

 7, pt. 1, 1904, p. 644. 



Tetragraptus acanthonotus Gurley. 



Tetragrapsus acanthonotus Gurley, Jour. Geol., 4, 1896, p. 65, pi. 4, figs. 1, la. 

 Canadian (Levis): Near Point Levis, Quebec. 



