1288 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Triarthrus beckl macasteyensis Twenhofel. 



Triarthrus becki macasteyensis Twenhofel, Bull. Victoria Mem. MUB., 3, 1914, p. 



35. 

 Trenton (Macasty): Macasty Bay, Anticosti. 



Triarthrus belli Matthew. 



Triarthrus belli Matthew, Bull. Nat. Hist. Soc. New Brunswick, No. 20, 1902, p. 

 412, pi. 18, fig. 8; Geol. Surv. Canada, Rep. Cambrian Rocks Cape Breton, 

 1903, p. 230, pi. 18, fig. 8. 



Canadian (Bretonian Div. C 3c2): McLeod Brook, near Boisdale, Cape Breton, 

 Nova Scotia. 



Triarthrus billings! Barrande. 



Triarthrus Billingsi Barrande, Syst. Sil. du Centre Boheme, 1, Suppl., 1872, p. 



427, pi. 32, figs. 4, 5. 

 Trenton (Collingwood): Cape Tourmente, below Quebec, Canada. 



Triarthrus canadensis Smith. 



Triarthrus canadensis Smith, Canadian Jour., n. s., 6, 1861, p. 275, fig. 

 Trenton (Collingwood): Whitby, Ontario. 



Triarthrus flscheri Billings. 



Triarthrus Fischeri Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 291, fig. 



280. Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 286. 

 Atops fischeri Miller, N. A. Geol. Pal., 1889, p. 532 (gen. ref.). 

 Chazyan (Quebec N, P): Table Head, Pistolet Bay, and Portland Creek, 



Newfoundland. 



Triarthrus glaber Billings. 



Triarthrus glaber Billings, Canadian Nat. Geol., 4, 1859, pp. 382, 383; Geol. 

 Canada, Geol. Surv. Canada, 1863, p. 202, fig. 198. Chapman, Expos. Min. 

 Geol. Canada, 1864, p. 140. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 

 1890, p. 1209, fig. Ami, Canadian Rec. Sci., 1892, p. 29. 



Trenton (Collingwood): Lake St John, Quebec. 



Triarthrus spinosus Billings. 



Triarthrus spinosus Billings, Geol. Surv. Canada, Rep. Progr. for 1853-1856, 1857, 

 p. 340; Canadian Nat. Geol., 4, 1859, p. 383; Geol. Canada, Geol. Surv. 

 Canada, 1863, p. 202, fig. 199. Chapman, Expos. Min. Geol. Canada, 1864, 

 p. 140. Ami, Trans. Ottawa Field Nat. Club, 1, No. 3, 1882, p. 64; ibid., 1883, 

 p. 88, pi. 1, fig. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 1209, 



fig- 

 Trenton (Collingwood): Gloucester, Ontario. 



TRIBLIDIUM of authors. See Tryblidium Lindstrom and Archinacella Ulrich and 

 Scofield. 



TRIBLIDIUM STRIATUM Miller. See Helcionopsis striata. 

 TRIBLIDIUM UNGUIFORME Miller. See Vallatotheca unguiformis. 



TRICHOPHYCUS Miller and Dyer. Genotype: T. lanosum Miller and Dyer. 



Trichophycus Miller and Dyer, Jour. Cincinnati Soc. Nat. Hist., 1, 1878, p. 24. 

 James, ibid., 7, 1884, p. 130, 158. Miller, N. A. Geol. Pal., 1889, p. 147. 



Trichophycus lanosum Miller and Dyer. 



Trichophycus lanosus Miller and Dyer, Jour. Cincinnati Soc. Nat. Hist., 1, 1878, 



p. 25, pi. 1, figs. 3, 4. James, ibid., 7, 1885, p. 158, 159, pi. 9, fig. 4. Miller, 



N. A. Geol. Pal., 1889, p. 147, fig. 82. 

 Maysville(Corryville): Warren County, Ohio. 



