NO. 13 DIKELOCEPHALUS AND OTHER GENERA 351 



FORMER GENERIC REFERENCE. PRESENT GENERIC REFERENCE. 



Dikeloccphalus hartti (Walcott) Stose (U. S. 



Geol. Surv. Geol. Atlas, U. S. Folio No. 170, 



1909, p. 6) Dikeloccphalus Owen. 



Dikeloccphalus hisinge7-i Billings (Geol. Surv. 



Canada, Pal. Foss., Vol. i, 1865, p. 196) Lisauia Walcott ? 



Dicclloccphalus inexpectans Walcott 



(Monogr. U. S. Geol. Surv., Vol. 8, 1884, 



p. 90, pi. I, fig. 10) Coiwkcphalina Brogger. 



Dicclloccphalus ? interprcs Read (Mem. Geol. 



Surv. India, ser. 15, Vol. 7, Mem. No. i, 



Cambrian Fossils of Spiti, 1910, p. 38, pi. 5, 



figs. 9-13) Ptychoparia Corda ? 



Dicclloccphalus iole Walcott (Monogr. U. S. 



Geol. Surv., Vol. 8, 1884, p. 43, pi. 10, fig. 19) . Conokcphalina Brogger ? 

 Dikeloccphalus iozvensis Owen (Geol. Surv. 



Wis., Iowa, and Minn., 1852, p. 575) Crepicephalus Owen. 



Dikeloccphalus latifrons Shumard (Trans. 



Acad. Sci., St. Louis, Vol. 2, 1863, p. 101) .. .Ptychoparia wisconsincnsis 



(Owen). 

 Dicclloccphalus ? leptccnarum Wiman (Arkiv 



for Zoologi, Bd. 3, 1906, No. 24, p. 5, pi. 12, 



figs. 1-3) Saukia Walcott ? 



Dikeloccphalus lodensis Whitfield (Geol. Wis- 

 consin, Vol. 4, 1882, p. 188, pi. 10, fig. 14, pi. 



27, figs. 12, 13) Saukia Walcott. 



Dikeloccphalus (Centroplcura) lovcni (Ange- 



lin) Koken (Die Leitfossilien, Leipzig, 1896, 



p. 17) Parad oxides loveni Angelin. 



Dikeloccphalus magnificus Billings (Geol. Surv. 



Canada, Pal. Foss., Vol. i, 1865, p. 400).... New genus Hungaia Walcott 



(MSS.). 

 Dikclloccphalus ? marcoui Whitfield (Bull. 



American Mus. Nat. Hist., Vol. i, 1884. p. 



150) Olcnoidcs Meek. 



Dikeloccphalus niarica Walcott (Monogr. U. S. 



Geol. Surv., Vol. 8, 1884, p. 44, pi. 10, fig. 13) . -Saukia Walcott 

 Dikeloccphalus megalops Billings (Geol. Surv. 



Canada, Pal. Foss., Vol. i, 1865, p. 402,) ... .Conokcphalina Brogger. 

 Dicclloccphalus micro pthalmiis Holm (Geol. 



Foren. i Stockholm Forhandl., Vol. 19, 1898, 



p. 466) Anoniocarc Angelin ? 



Dicclloccphalus ininncsotensis ?. Identified by 



R. P. Whitfield. (Monogr. U. S Geol. Sur- 

 vey, Vol. 12, 1886, p. 60) Saukia coloradocnsis Walcott. 



Dikeloccphalus minnesotensis linibatus Hall 



(Sixteenth Ann. Rep. N. Y. State Cab. Nat. 



Hist., 1863, pi. 141, pi. 9, fig. 12) Dikeloccphalus linibatus Hall. 



Dikeloccphalus miniscaensis Owen (Geol. Surv. 



Wis., Iowa, and Miim.. 1852, p. 574) Ptychaspis Hall. 



