8 BULLETIN" 92, UNITED STATES XATIOXAJ MUSEUM. 



Acrotreta blsecta Continued. 



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



406-407, pi. 18, figs. 1, 2; Geol. Surv. Canada, Rep. Cambrian Rockt; 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. V. 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. 17. 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 Clarke (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 Upper Cambrian of Oklahoma. 



Holotype and paratypes. 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 northeast of Portland Creek, Newfoundland. 



ACROTRETA GEMMA Walcott. See Acrotreta curvata and A. idahoensis alta. 



Acrotreta idahoeiisis Walcott. 



Acrotreta attenuata Meek (part), 6th Ann. Rep. U. S. Geol. and Geog. Surv. 



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

 Acrotreta idahoensis Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 587; Mon. U. 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 paratypes.C&t. Nos. 52089, 52091, U.S.N.M. 



Acrotreta idahoensis alta Walcott. 



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

 pp. 17, 18, pi. 1, figs, la, Ib (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 idahoensis alta Walcott, Proc. U. S. Nat. Mus., 25, 1902, p. 588; Mon. 

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



