BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 861 



OBOLUS— Continued. 



Palaeobolus Matthew, Bull. Nat. Hist. Soc. New Brunswick, 4, pt. 3, 1899, pp. 201- 



202; Geol. Surv. Canada, Hep. Cambrian Rocks Cape Breton, 1903, pp. 140-141. 

 Obolus (Palaeobolus) Walcott, Smiths. Misc. Coll., 53, 1908, pi. 11, pp. 142, 144; 



U. S. Geol. Surv. Mon., 51, pt. 1, 1912, p. 426. (Genotype: Paheobolus 



bretonensis Matthew.) 

 Obolus (Westonia) Walcott, Proc. U. S. Nat. Mus., 23, 1901, pp. 683 and 691; 



Smiths. Misc. Coll., 53, 1908, pi. 11, and pp. 142 and 144; Mon. U. S. Geol. 



Surv., 51, pt. 1, 1912, p. 450. 

 Westonia Matthew, Geol. Surv. Canada, Rep. Cambrian Rocks Cape Breton, 1903, 



p. 205. (Genotype: Lingula aurora Hall.) 



Obolus (Lingulepis) acuminatus Walcott. See Lingulella (Lingulepis) acuminata. 



Obolus (Lingulobolus) afflnis (Billings). 



Lingulella? affinis Billings, Canadian Nat., 2d ser., 6, 1872, p. 468; fig. 4, p. 467; 



Geol. Surv. Canada, Pal. Foss., pt. 1, 1874, p. 67, fig. 35, p. 66; Geol. Surv. 



Newfoundland, Rep. Progr. 1881, App., 1882, p. 15. 

 Lingulepis affinis Walcott, Amer. Jour. Sci., 3d ser., 37, 1889, p. 381 (gen. ref.). 

 Lingulobolus affinis Matthew, Trans. Roy. Soc. Canada, 2d ser., 1, sec. 4, 1895, 



p. 261, pi. 1, figs. 4a, b.— Grabau, Boston Soc. Nat. Hist., 1, pt. 3, 1900, p. 621. 

 Lingulobolus affinis cuneata Matthew, Trans. Roy. Soc. Canada, 2d ser., 1, sec. 4, 



1895, p. 262, pi. 1, figs. 4c, 4d. 

 Obolus (Lingulobolus) affinis Walcott, Amer. Jour. Sci., 4th ser., 6, 1898, p. 327; 



Mon. U. S. Geol. Surv., 51, 1912, p. 431. 

 Lower Ordovician: One mile north of Lance Cove, Great Bell Island, Conception 



Bay, Newfoundland; Limestone pebble in Carboniferous conglomerate, north 



of Fall River, Bristol County, Massachusetts. 

 Plesiotype.— Cat. No. 51679, U.S.N.M. 



Obolus anceps Walcott. 



Obolus anceps Walcott, Proc. U. S. Nat. Mus., 21, 1898, pp. 388-389; Mon. U. S. 

 Geol. Surv., 51, 1912, p. 380, pi. 10, figs. 3, 3a-f. 



Upper Cambrian and Lower Ordovician: Northeast of Adams Hill, Eureka Dis- 

 trict, Eureka County, Nevada. 



Holotype and paraty pes. —Cat. Nos. 27302, 51541, U.S.N.M. 



Obolus belli Walcott. See Lingula (Palseoglossa) belli. 



Obolus (Lingulella) bellus Walcott. See Lingulella bella, L. lens and L. 

 concinna. 



Obolus (Palaeobolus) bretonensis (Matthew). 



Palyeobolus bretonensis Matthew, Bull. Nat. Hist. Soc. New Brunswick, 4, pt. 3, 



1899, p. 202, pi. 2, figs. 2a-i; Geol. Surv. Canada, Rep. Cambrian Rocks 



Cape Breton, 1903, pp. 141-143, pi. 9, figs. 2a-h. 

 Obolus bretonensis Matthew, Trans. Roy. Soc. Canada, 2d ser., 8, sec. 4, 1902, 



p. 95, pi. 1, figs. 5a-e. 

 Obolus (Palaobolus) bretonensis Walcott, Mon. U. S. Geol. Surv., 51, 1912, p. 426, 



pi. 32, figs. 5a-g.* 

 Middle Cambrian and Canadian (Bretonian — Div. C3a): McAdams shore, East 



Bay, Cape Breton, Nova Scotia. 



Obolus canadensis Billings. See Dinobolus magnificus and D. canadensis. 

 Obolus (Lingulella) concinnus Walcott. See Lingulella concinna. 

 Obolus conkadi Hall. See Dinobolus conradi. 



