BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 125 



BiUingsella coloradoensis — Continued. 



Orthis (Billingsella) pepina Sardeson, Bull. Minnesota Acad. Nat. Sci., 4, 1896, 



p. 96. 

 Billingsella pepina Hall and Clarke, Pal. New York, 8, pt. ], 1892, \\ 230, pi. 7, 



figs. 16-19; pi. 7a, figs. 7-9. 

 Billingsella coloradoensis Walcott, Mon. U. S. Geol. Surv., 32, pt. 2, 1899, pp. 



450^51, pi. 61, figs. 1, la-d; Proc. U. S. Nat. Mus., 28, 1905, pp. 231-234.— 



Grabau and Shinier, N. A. Index Fossils, 1, 1907, p. 210. — Walcott, Mon. 



U. S. Geol. Surv., 51, 1912, pp. 299, 751, fig. 6, pi. 85, figs. 1, la-z. 

 Ozarkian (Oneota): Stillwater, Washington County, Minnesota. Middle and 



Upper Cambrian of Montana, Texas, Wisconsin, etc. 

 Plenoty pes. —Cat. Nos. 34774, 34776, U.S.N.M. 



Billingsella dice Walcott. 



Billingsella dice Walcott, Proc. U. S. Nat. Mus., 28, 1905, p. 234; Mon. U. S. 



Geol. Surv., 51, 1912, p. 754. 

 Lower Ordovician (drift bowlder of sandstone): St. Al):)ans, Franklin County, 



Vermont. 

 Holotype and paratypes. —Cat. No. 52248, U.S.N.M. 



Billingsella(?) grandaeva (Billings). 



Orthisina gi'andseva Billings, Canadian Nat. Geol., 4, 1859, p. 349, fig. 1; Geol. 

 Canada, 1863, p. 113, fig. 21. — Lesley, Geol. Surv. Pennsylvania, Rep. P 4, p. 

 540, fig. 

 Canadian (Romaine): Mingan Islands, Canada. 

 Observation.^ — See Orthis piger for a possible synonym. 



Billingsella laurentina Hall and Clarke. See Orthis(?) laurentina. 



Billingsella pepina Hall and Clarke. See Billingsella coloradoensis. 



Billingsella(?) primordialis (\\Tiitfield). 



Streptorhynchus? primordiale ^\^litfield, Bull. Amer. Mus. Nat. Hist., 1, 1886. 



p. 301, pi. 24, fig. 7.— Lesley, Geol. Sm-v. Pennsylvania, Rep., P 4, 1890, p. 



1096, fig.— Seely, Rep. State Geol. Vermont, 7, 1910, pi. 52, fig. 7. 

 Canadian (Beekmantown): Fort Cassin, Vermont. 



BiLLiNGSiA Ford. See Elkania Ford. 



BiLLiNGSiA Walcott. See Matherella Walcott. 



BiLLiNGSiA PRETiosA Ford. See Acrothele pretiosa. 



BiLLiNGSiA 8ARATOGENSIS Walcott. See Matherella saratogensis. 



BILLINGSITES Hyatt. Genotype: Ascoceras canadense Billings. 



Billingsites Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1884, p. 278.— Zittel, Handb. 

 Pal., 2, 1884, p. 373.— Hyatt, Zittel-Eastman, Textb. Pal., 1, 1900, p. 516; 

 2ded., 1913, p. 597. 



Billingsites canadensis (Billings). 



Ascoceras Canadense Billings, Geol. Surv. Canada, Rep. Progr. for 1853-1856, 1857, 



p. 310; Geol. Canada, Geol. Surv. Canada, 1863, p. 218, fig. 227; Cat. Sil. 



Foss. Anticosti, Geol. Surv. Canada, 1866, p. 23 (loc. ref.).— Miller, N. A. 



Geol. Pal., 1889, p. 432, fig. 726. 

 Billingsites canadense Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1884, p. 278 



(gen. ref.). 

 Richmond (English Head and Charleton): English Head, etc., Anticosti. 



