8 BULLETIN 92, UNITFD STATES XATTONAL MUSEUM. 



Acrotreta bisecta— (ontinued. 



Acrotreta sipo Mattliew, Bull. Nat. Hist. Soc. New Brunswick, 4, pt. 5, 1902, pp. 



406-407, pi. IS, figs. 1, 2; Geol. Surv. Canada, Rep. Cambrian Rocku Cape 



Breton, 1903, pp. 185-186, pi. 18, figs. 1, 2. 

 Canadian (Bretonian — Div. C. 3 c): McLeod Brook, Cape Breton, Nova Scotia, 



and Navy Island, St. John Harbor, New Brunswick. 



Acrotreta?? cancellata Walcott. 



. Acrotreta?? cancellata Walcott, Proc. U. S. Nat. Mus., 28, 1905, p. 299; Mon. U. S. 

 Geol. Surv., 51, 1912, p. 679, pi. 79, figs. 5, 5a. 

 Canadian (Lower Pogonip): Roundtop Mountain, Eureka County, Nevada. 



Acrotreta convexa Walcott. 



Acrotreta convexa Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 584; Mon. U. S. 



Geol. Surv., 51^ p. 682, pi. 66, figs. 6, 6a-c. 

 Canadian (Bretonian — Div. C. 3 c): Salmon River, thirteen miles south of Marion 



Bridge, etc.. Cape Breton, Nova Scotia. 



Acrotreta curvata Walcott. 



Acrotreta gemma Walcott (not Billings) (part), Mon. U. S. Geol. Surv., 8, 1884, 

 pp. 17, 18, pi. 1, figs. Id, le (not figs, la-c, f); 10th Ann. Rep. U. S. Geol. 

 Surv., 1891, p. 608, pi. 67, fig. 5b (not figs. 5a-e).— Hall and Clai'ke (part). 

 Pal. New York, 8, pt. 1, 1892, p. 102, fig. 55 (not figs. 56, 57).— Walcott (part), 

 Mon. U. S. Geol. Surv., 32, pt. 2, 1899, p. 499, pi. 62, fig. 2e (not figs. 2, 2a-d). 



Acrotreta curvata Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 584; Mon. U. S. 

 Geol. Surv., 51, 1912, p. 682, pi. 68, figs. la-n. 



Canadian (Lower Pogonip): Hamburg Ridge, Eureka District, Eureka County, 

 Nevada. Also in L'pper Cambrian of Oklahoma. 



Holoiype and par aty pes. —Cat. No. 35269, U.S.N.M. 



Acrotreta gemma Billings. 



Acrotreta gemma Billings, Geol. Surv. Canada, Pal. Fossils, ], 1865, pp. 216, 217, 



figs. 201a-f.— Walcott, Mon. U. S. Geol. Surv., 51, 1912, p. 685, pi. 66, figs. 



la-b. 

 Canadian (Quebec — P.): Four miles uortlieast of Porlland Creek, Ne^vfoundland. 



AcROTUETA OEMMA Walcott. See Acrotreta curvata and A. idahoenais alta. 



Acrotreta idahocnsis Walcott. 



Acrotreta attenuata Meek (part), 0th Ann. Rep. V. S. Geol. and Geog. Surv. 



Terr, for 1872, 1873, p. 463, footnote. 

 Acrotreta idahocnsis Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 587; Mon. V. S. 



Geol. Surv., 51, 1912, p. 687, pi. 65, figs, la-i; pi. 68, figs. 2a-g. 

 Canadian (Lower Pogonip): East of Hamburg Ridge, etc.. Eureka County, 



Nevada. Also Upper and Middle Cambrian of Utah, Montana, etc. 

 Holotype and paraty pes. —Cat. Nos. 52089, 52091, U.S.N.I\r. 



Acrotreta idahoeusLs alta Walcott. 



Acrotreta gemma Walcott (not Billings) (part), Mon. U. S. Geol. Surv., 8, 1884, 

 pp. 17, 18, pi. 1, figs, la, lb (not figs. Ic-f); pi. 9, figs. 9, 9a; 10th Ann. Rept. 

 U. S. Geol. Surv., 1891, p. 608, pi. 67, figs. 5, 5a (not figs. 5b-e).— Hall and 

 Clarke (part) Pal., New York, 8, pt. 1, 1892, p. 102, figs. 56, 57 (not fig. 55).- - 

 Walcott, (part), Mon. U. S. Geol. Surv., 32, pt. 2, 1899, p. 499, pi. 62, figs. 

 2a, 2c (not figs. 2, 2b, 2d, 2e). 



Acrotreta idahocnsis alta Walcott, Proc. V. S. Nat. Mus., 25, 1902, p. 588; Mon. 

 U. S. Geol. Surv., 51, 1912, p. 689, pi. 65, figs. 4-4b. 



