1911] Teller, Fossils from the Palwozoic Formations. 267 



Ptychoparia diademata (Hall.) Upper Cambrian. 



Conocephalites diadematus, Sixteenth Ann. Rept. N. Y. State Cab. 



of Nat. Hist., Ball, 1863, p. 167, pi. 7. figs. 36, 38a, and pi. 8. 



figs. 18, 21. 

 Ptychoparia diademata, Bull. Am. Mus. of Nat. Hist., Whitfield. 



1898, Vol. 11, Ft. 1, p. 12. 

 Locality — Marine Mills, Wis. 

 Types— Am. Mus. of Nat. Hist. 



Ptychoparia dorsalis' (Hall.) Potsdam. 



Conocephalites (Arionellus ?) dorsalis, Sixteenth Ann. Kept. N. Y. 



State Cab. of Nat. Hist., Hall, 1863, p. 222. 

 Ptychoparia dorsalis. Bull. U. S. Geol. Surv., Yodges. 1S90. Vol. 6?., 



p. 141. 

 Locality — Trempealeau, Wis.. 

 Types—? 



Ptychoparia eos (Hall.) Upper Cambrian. 



Conocephalites cos, Sixteenth Ann. Kept. N. Y. State Cab. of Nat. 



Hist., Hall, 1S63, p. 151, pi. 7, figs. 24. 25 and pi. S. figs. 8. 9. 

 Conaspis eos, Bull. Am. Mus. of Nat. Hist., Whitfield, 1898, Vol. 



11, Ft. 1, p. 8. 

 Ptychoparia eos. Bull. U. S. Geol. Surv., Vodges. 1S90. Vol. 63. 



p. 141. 

 Locality — Trempealeau, Wis. 

 Types — Am. Mus. of Nat. Hist. 



Ptychoparia eryon (Hall.) Upper Cambrian. 



Conocephalites eryon, Sixteenth Ann. Kept. N. Y. State Cab. of 



Nat. Hist., Hall, 1863, p. 157, pi. 7, figs. 10-16, and pi. 8, 



figs. 16 and 31. 

 Ptychoparia eryon. Bull. Am. Mus. of Nat. Hist., ..Whitfield. 1S9S. 



Vol. 12, Pt. 1, p. 12. 

 Locality — Trempealeau, and near La Crosse, Wis. 

 Types — Am. Mus. of Nat. Hist. 



Ptychoparia minor (Hall.) Potsdam. 



Undetermined Trilobite, Geol. Reeon., Chippewa Land Dist., Owen, 



1848, p. 15, pi. 7, fig. 4. 

 Conocephalites minor, Trans. Acad. Nat. Sci., St. Louis. Shumard. 



1863, Vol. 2, p. 105. 

 Conocephalites minor, Sixteenth Ann. Kept. N. Y. State Cab. of 



Nat. Hist., Hall, 1863, p. 149, pi. S, figs. 1-4. 

 Ptychoparia minor Mono. U. S. Geol. Surv.. Walcott, 1884. Vol. 8, 



p. 91. 

 Locality — Near Black River Falls. Wis. 

 Types—? 



