260 Bulletin Wisconsin Natural History Society. [Vol. 9, No. 4- 



Dikelocephalus eatoni Whitfield. Lower Magnesian. 



Ann. Eept. Geol. Snrv. Wis., Whitfield, 1877, p. 65. 



Geol. of Wis., Whitfield, 1882, Vol. 4. p. 202, pi. 14, figs. 11-17,. 



pi. 10, figs. 4, 5. 

 Locality — Baraboo, W r is. 

 Types — LTniv. of California. 



Dikelocephalus granulosus Owen = Ptychaspis striata. 

 Dikelocephalus ? iowensis Owen = CrepicepJialus iowensis. 

 Dikelocephalus latifrons Shumard = Anomocare wisconsensis. 

 Dikelocephalus latifrons (Shumard) Hall ='Anomocare wisconsensis. 



Dikelocephalus lodensis Whitfield. Upper Cambrian. 



. Ann. Kept. Geol. Snrv. Wis.. Whitfield. 1879, p. 51. 



Geol. of Wis.. Whitfield. 1882, Vol. 4. p. 1SS. pi. 10. fig. 14, am:. 



p. 341. pi. 27, figs. 12, 13. 

 Locality — Prairie du Sac, Wis. 

 Types — Univ. of California. 



Dikelocephalus minisccensis Owen = Ptychaspis minisc nsis. 



Dikelocephalus misa Hall. Upper Cambrian. 



Sixteenth Ann. Eept. N. Y. State Cab. of Nat, Hist.. Hall, 1S63, 



p. 144, pi. 10, figs. 4-S. 

 Locality — Trempealeau, Wis. 

 Types — Am. Mus. of Nat. Hist. 



Dikelocephalus osceola Hall. L T pper Cambrian. 



Sixteenth Ann. Eept, N. Y. State Cab. of Nat. Hist.. Hall, 1S63, 



p. 146, pi. 10, figs. IS, 19 and pi. 7. fig. 49? 

 Locality — Osceola Mills, Wis. 

 Types— Am. Mus. of Nat. Hist. 



Dikellocephalus pepinensis ? Hall = DiJcelocephalus crassimarginatis. 



Dikelocephalus spiniger Hall. Upper Cambrian. 



Sixteenth Ann. Eept. N. Y. State Cab. of Nat. Hist.. Hall, 1S63. 



p. 143, pi. 10, figs. 1, 2 and 3? 

 Locality — Trempealeau, Wis, 

 Types— Am. Mus. of Nat. Hist. 



