BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 437 



DiKELocEPHALUs EATONi Whitfield. See Platvcolpus eatoni. 



DiKELocEPHALus HARTii Walcott (1909). See SauMa stosei. 



Dikelocephalus hartti (Walcott). 



Conocephalites Hartti Walcott, 32d Rep. New York State Mus. Nat. Hist., 1880, 



p. 130. 

 Dicellocephalus hartti Walcott, Bull. U. S. Geol. Surv., 30, 1886, p. 21.— Lesley, 



Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 199, figs.— Walcott, Smiths. 



Misc. Coll., 57, 1912, p. 273, pi. 44, figs. l-7a. 

 Dikelocephalus hartti Walcott, Smiths. Misc. Coll., 57, No. 13, 1914, p. 368, pi. 63, 



figs. 1-7, 7a. 

 Ozarkian or Upper Caml)rian: Near Saratoga Springs (Hoyt), and near Cha- 



teaugay, New York (top of Potsdam). 

 Coty pes. —Ca,t. Nos. 58571-58577, U.S.N.M. 



Dikelocephalus hisingeri Billings. See Lisania? hisingeri. 



Dikelocephalus magnificus Billings. See Hungaia magnifica. 



Dikelocephalus megalops Billings. See ConokephaUna megalops. 



Dikelocephalus? missisqtioi Billings. 



Dikelocephalus Missisquoi Billings, Pal. Foss., Geol. Sur\'. Canada, 1865, p. 199. 

 Canadian (Beekmantown): Philipsburg, Quebec. 



Dikelocephalus newtonensis Weller. See Calvinella newtoneneia. 

 Dikelocephalus oweni Billings. See Anomocarella? oweni. 

 Dikelocephalus pauper Billings. See Ptychoparia? pauper. 

 Dikelocephalus planifrons Billings. See Anomocarella? planifrona. 

 Dikelocephalus selectus Billings. See Ptychaspis? selectus. 

 Dikelocephalus Sesostris Billings. See Ptychaspis sesostris. 



Dikelocephalus tribulis (Walcott). 



Dicellocephalus tribulis Walcott, Smiths. Misc. Coll., 57, 1912, p. 274, pi. 44, figs. 



8,8a. 

 Dikelocephalus tribulis Walcott, Smiths. Misc. Coll., 57, 1914, p. 372, pi. 63, figs. 



8-10, 10a. 

 Ozarkian or Upper Camlirian (Hoyt): Near Saratoga Springs, New York. 

 Holotype.— Cat. No. 58578, U.S.N.M. 



DILOBELLA Ulrich. Genotype: D. typa Ulrich. 



Dilobella Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 672.— Grabau and Shimer, 

 N. A. Index Fossils, 2, 1910, p. .347. 



Dilobella typa Ulrich. 



Dilobella typa Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 673, pi. 46, figs. 30-34.— 

 Grabau and Shimer, N. A. Index Fossils, 2, 1910, p. 348, fig. 16588, s^ t.— 

 Bassler, Zittel-Eastman Textb. Pal., 1913, p. 738, fig. 1425p. 



Bollia typa ]\Iillcr, N. A. Geol. Pal., 2d App., 1897, p. 787 (gen. ref.). 



Black River (Decorah): St. Paul and Cannon P'alls, Minnesota. 



Cotypes.— Cat. No. 41641, U.S.N.M. 



DiMERocRiNiTES Phillips. See Dimerocrinua Phillips. 



