BIBLIOGRAPHIC LIST OF GENEEA AND SPECIES. 597 



Hellcotoma perstrlata Billings. 



Helicotoma perstriata Billings, Canadian Nat. Geol., 4, 1859, p. 356. 

 Chazyan (Jklingan): Mingan Islands, Quebec. 



nelicotoma planulata Salter. 



Helicotoma planulata Salter, Can. Org. Rem., Geol. Surv. Canada, dec. 1, 1859, 

 p. 14, pi. 2, figs. 5-7.— Hall, Rep. Geol. Surv. Wisconsin, 1862, p. 39, 

 fig. 3; p. 439.— Chamberlin, Geol. Wisconsin, 1, 1883, p. 157.— T^Tiiteaves, 

 Canadian Rec. Sci., 5, 1893, p. 323 (loc. occ). — Ulricli and Scofield, Geol. 

 Minnesota, 3, pt. 2, 1897, p. 1033, pi. 74, figs. 16-17.— Grabau and Shimer, 

 N. A. Index Fossils, 1, 1909, p. 658, figs. 906h, i. 



Black River: Allumette Island, Ottawa River, etc. (Leray), Canada; Lincoln 

 County, Missouri; Wisconsin; New York. 



Plesiolypes.— Cat. No. 45831, U.S.N.M. 



Helicotoma planulata var. muricata Salter. See Helicotoma muricata. 



Helicotoma planulata robusta Ulrich and Scofield. 



Helicotoma planulata var. robusta Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 



1897, p. 1033, pi. 74, fig. 15. 

 Black River (Platteville): Jo Daviess County, Illinois. 

 Eolotype.—G&t. No. 45832, U.S.N.M. 



Helicotoma planulatoides Ulrich. 



Helicotoma planulatoides Ulrich, Geol. Minnesota, 3, pt. 2, 1897, p. 1034, pi. 74, 



figs. 28-30. 

 Black River (Lowville): High Bridge, Kentucky; Tennessee. 

 Holotype.— Cat. No. 45833, U.S.N.M. 



Helicotoma proserpina Billings. 



Helicotoma Proserpina Billings, Pal. Fossils, 1, Geol. Surv. Canada, 1865, p, 247, 



fig. 233. 

 Canadian (Quebec — G): Cape Norman, Newfoundland. 



Helicotoma similis Whitfield. 



Helicotoma similis Whitfield, Bull. Amer. Mus. Nat. Hist., 3, .1890, p. 31, pi. 1, 

 figs. 1, 2.— Sardeson, Jour. Geol., 11, 1903, p. 481, fig. 19.— Seely, Vermont 

 State Geol., Rep. 7, 1910, pi. 56, fig. 2. 

 Canadian (Beekmantown) : Providence Island, Lake Champlain, Vermont. 



Helicotoma? splnosa Salter. 



Helicotoma? spinosa Salter, Geol. Surv. Canada, dec. 1, 1859, p. 15, pi. 2, 



figs. 9, 10. 

 Black River (Leray): Allumette Island, Ottawa River, Canada. 



Helicotoma subquadrata Ulrich. 



Helicotoma subquadrata Ulrich, Geol. Minnesota, 3, pt. 2, 1897, p. 1034, pi. 70, 



figs. 31-33. 

 Stones River (Murfreesboro) : Murfreesboro, Tennessee. 

 Cotypes.— Cat. No. 46058, U.S.N.M. 



Helicotoma tennesseensis Ukich and Scofield. 



Helicotoma tennesseensis Safford, Geol. Tennessee, 1869, p. 288 (nom. nud.). — 



Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 1034, pi. 74, figs. 



20-24.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 659, figs. 906j, k. 

 Stones River (Murfreesboro): Murfreesboro, Tennessee. 

 Cotypes.—C&t. No. 46059, U.S.N.M. 



