108 BULLETIN 02, UNITED STATES NATIONAL MUSEUM. 



Batostoma canadeuse (Foord). 



Amplexopora Canadensis Foord, Contr. Micro-Pal. Cambro-Sil., 1883, p. 17, pi. 4, 



figs. 2-2d. 

 Batostoma Canadensis Ulricli, Geol. Minnesota, 3, 1893, p. 317. 

 Mohawkian: St. Joseph Island, Lake Huron (Black River); Joliette, Quebec 

 (?Trenton). 



Batostoma? decipiens Ulrich. 



Batostoma? decipiens Uliich, Geol. Minnesota, 3, 1893, p. 298, pi. 27, figs. 16-19. 

 Black River (Decorah): Minneapolis, Minnesota. 

 Eolotype.— Cat. No. 43511, U.S.N. M. 



Batostoma fertile UWch. 



Batostoma fertilis Ulricli, 14th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 1886, 

 p. 92; Geol. Minnesota, 3, 1893, p. 290, pi. 25, figs. 1-11; Zittel's Textb. Pal. 

 (Engl, ed.), 1896, p. 275, fig. 459A.— Sardeson, Joiu-. Geol., 9, 1901, p. 12.— 

 Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 136, fig. 188k, 1901.— 

 Bassler, Bull. U. S. Nat. Mus., 77, 1911, pp. 274, 275, fig. 163. 



Black River (Decorah): Minneapolis, Minnesota, and vicinity. 



Ordovician (Echinospherites limestone) : Near Reval, Esthonia, Russia. 



Coiypes.— Cat. No. 43505, U.S.N.M. 



Batostoma fertile circulare Ulrich. 



Batostoma fertile var. circulare Ulrich, Geol. Minnesota, 3, 1893, p. 291, pi. 25, 



figs. 8, 9— Bassler, Bull. U. S. Nat. Mus., 77, 1911, pp. 275, 276, fig. 1G4; 



Zittel-Eastman Textb. Pal., 1913, p. 338, fig. 492b. 

 Batostoma fertile Ulrich, Zittel's Textb. Pal. (Eng. ed.), 1896, p. 275, fig. 459B. 

 Black River (Decorah): Llinneapolis, Minnesota, and \icinity. 

 Ordovician (Echinospha;rites limestone) : Near Reval, Esthonia, Russia. 

 Holotype.— Cat. No. 43506, U.S.N.M. 



Batostoma humile Ulrich. 



Batostoma humile Ulrich, Geol. Minnesota, 3, 1893, p. 294, pi. 25, figs. 29-36. 

 Trenton (Prosser): St. Paul and Cannon Falls, Minnesota; Decorah, Iowa. 

 Cotypes.— Cat. No. 43509, U.S.N.M. 



Batostoma imperfectum Ulrich. See Hemiphragma imperfectum. 



Batostoma implicatum (Nicholson). 



Chtetetes implicata Ulrich, Cat. Foss. Cincinnati Group, 1880, p. 12 (not defined). 

 Monticulipora (Heterotrypa) implicata Nicholson, Genus Monticulipora, 1881, p. 



147, pi. 2, figs. 7, 7e. 

 Monticulipora implicatum J. F. James, Jour. Cincinnati Soc. Hist., IG, 1894, p. 198 

 Batostoma implicatum Uhich, ibid., 5, 1882, p. 256; 7, 1883, p. 83.— Nickles and 



Bassler, Bull. U. S. Geol. Surv., 173, 1900, p. 178.— Nickles, Bull. Kentucky 



Geol. Surv., 5, 1905, p. 48, pi. 2, fig. 6.— Cumings, 32d Ann. Rep. Dep. Geol. 



Nat. Res. Indiana, 1908, p. 774, pi. 7, fig. 7; pi. 8, fig. 2. 

 Alecto nexilis James, Intr. Cat. Foss. Cincinnati Group, 1875, p. 3. — Bassler, 



Proc. U. S. Nat. Mus., 30, 1906, p. 10. 

 Ceramopora? irregularis James, Paleontologist, No. 1, 1878, p. 5 (part). — Bassler, 



Proc. U. S. Nat. Mus., 30, 1906, p. 26. 

 Eden: Cincinnati, Ohio, and vicinity. 



Batostoma irrasa Ulrich. See Hemiphragma irrasura, 



Batostoma jamesi (Nicholson). 



Chsetetes Jamesi Nicholson, Quart. Jour. Geol. Soc. London, 30, 1874, p. 506, pi. 

 29, figs. 10, 10b; Pal. Ohio, 2, 1875, p. 200, pi. 21, figs. 11, 11a; Ann Mag. 

 Nat. Hist., 4th. ser., 18, 1876, p. 89. 



