78 BULLETIN 02, UNITED STATES NATIONAL MUSEUM. 



Asaphiis(?) pelops Billings. 



Aeaphua pelops Billings, Pal. Fosa., 1, Geol. Siirv. Canada, 1865, p. 317, fig. 



304a, b. 

 Canadian (Beekmantown): Bedford, Missiaquoi County, Quebec. 



AsAPHUS PLANUS Dalman. See Isotelus gigas. 



AsAPHUs PLATYCEPHALUs Stokes. Sco Isotelus gigas. 



AsAPHUS PLATYCEPHALUS Billlnga. See Isotelus latus and Brachyaspis altilis. 



Asaphus(?) quadraticaudatus Billings. 



Asaphus quadraticaudatus Billings, Pal. Foss., 1, (ieol. Surv. Canada, 1SG5, p. 



272, fig. 258. 

 Chazyan (Quebec-N. P.): Table Head and four miles northeast Portland Creek, 



Newfoundland. 



Asaphus Romingeri Walcolt. See Basilicus romingeri. 

 Asaphus sus^ Whitfield. See Onchometopus susse. 

 Asaphus stokesii Murchison. See Proetus stokesii. 



Asaphus tetragonocephalus Green. 



Asaphus tetragonocephalus Green, Amer. Jour. Sci., 25, 1834, p. 335; Suppl. 



Mon. Tril. N. A., 1835, p. 12, cast 38. 

 Ordovician(?): ?Newport, New York. 

 Plastotype.—G&t. No. 4948, U.S.N. M. 



Observation. — The type is a specimen made up of two fragments of unidentified 

 Cambrian trilobites, probably Olenus. 



Asaphus? trentonensis Conrad. See Amphilichas trentonensis. 



Asaphus trla.ngulatus Whitfield. See Isoteloides homalonotoides. 



Asaphus ulrichi Miller. See Basilicus romingeri. 



Asaphus vetustus Hall. See Basilicus vetustus. 



Asaphus (Isotelus) vioilans Meek and Worthen, See Nileus vigilans. 



Asaphus wetherilli Green. See Dalmanites limulurus. 



Asaphus wisconsinensis Walcott. See Basilicus romingeri. 



ASCOCERAS Barrande. Genotype: A. bohemicum Barrande. 



Ascoceras Barrande in Haidinger's Mitthcil. d. Fr. d. Naturw., 3, 1847, p. 264-269; 

 Neues Jahrb. f. Min., etc., 1854, p. 11. pi. 1, fig. 13a, b.— Pictet, Traite de 

 Pal., 2d ed., 2, 1854, p. 639.— Barrande, Neues Jahrb. f. Min., etc.. 1855, pp. 

 257, 260, pi. 3, figs. 1-10, p. 320; Bull. Soc. Geol. France, 2d ser., 12, 1855, 

 p. 160, pi. 5, figs. 16-28.— Woodward, Mem. Mollusca, pt. 3, 1856, p. 450.— 

 Billings, Canadian Nat. Geol., 2, 1857, p. 137, fig. 9.— Barrande, Neues Jahrb. 

 f. Min., etc., 1860, p. 653; Syst Sil. du Centi-e Boheme, 2, pt. 1, 1867, p. 334.— 

 Whitfield, Bull. Amer. Mus. Nat. Hist., 1, 1881, p. 26, fig. 3.— Blake, Mon. 

 British Foss. Cephalopoda, 1882, p. 60.— Zittel, Handb. Pal., 2, Munich, 

 1884, p. 372.— Hyatt, Proc. Boston Soc. Nat. Hist., 22, 1884, p. 279; 23, 1888, 

 p. 483.— Lindstrom, Geol. Mag., dec. 3, 5, 1888, p. 532.— Foord, Cat. Foss. 

 Ceph. British Mus., 1, 1888, p. 246; 2, 1891, p. 387.— Miller, N. A. Geol. Pal. 

 1889, p. 432.— Lindstrom, Kongl. Sven. Vet.-Akad. Handl., 23, No. 12, 1890, 

 p. 14.— Koken, Die Leitfossilien, Leipzig, 1896, p. 49, text fig. 32, fig. 3.— 

 Hyatt, Zittel-Eastman Tcxtb. Pal., 1, 1900, p. 516; 2d ed., 1913, p. 596. 



