78 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Asaphus(?) pelops Billings. 



Asaphus pelops Billings, Pal. FOBS., 1, Geol. Surv. Canada, 1865, p. 317, fig. 



304a, b. 

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



ASAPHUS PLANUS Dalraan. See Isotelus gigas. 



ASAPHUS PLATYCEPHALUS Stokes. See Isotelus gigas. 



ASAPHUS PLATYCEPHALUS Billings. See Isotelus latus and Brachyaspis altilis. 



Asaphus(?) quadraticaudatus Billings. 



Asaphus quadraticaudatus Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 



272, fig. 258. 

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



Newfoundland. 



ASAPHUS ROMINGERI Walcott. See Basilicus romingeri. 

 ASAPHUS SUSM 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.C&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 TRIANGULATUS Whitfield. See Isoteloides homalonotoides. 



ASAPHUS ULRICHI Miller. See Basilicus romingeri. 



ASAPHUS VETUSTUS Hall. See Basilicus vetustus. 



ASAPHUS (ISOTELUS) VIGILANS 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 Mittheil. 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 Centre 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 Textb. Pal., 1, 1900, p. 516; 2d ed., 1913, p. 596. 



