242 Bulletin Wisconsin rtatural History Society. [Vol. 9, No. 4 



Cyrtoceras neleus Hall. Trenton (Ord.) 



Geol. Surv. Wis., Kept, of Prog., Hall, 1861, p. 40. 



Mem. Am. Mus, of Nat. Hist., Whitfield, 1895, Vol. 1, Pt. 2, p. 65, 



pi. 9, figs. 10, 11. 

 Locality — Beloit and Janesville, Wis. 

 Types — Am. Mas. of Nat. Hist. 



Cyrtoceras orcas Hall = Oncoceras orcas. 



Cyrtoceras planidorsatum Whitfield = Cyrtoceras planodorsatum. 



Cyrtoceras planodorsatum Whitfield. Trenton (Ord.) 



Cyrtoceras planidorsatum, Ann. Kept. Geol. Surv. Wis., Whitfield, 



1879, p. 57. 

 Cyrtoceras planodorsatum, Geol. of Wis., Whitfield, 1882, Vol. 4, 



p. 231, pi. 7, figs. 10-12. 

 Locality — Beloit, Wis. 

 Types — Univ. of California. 



Cyrtoceras pusillum Hall. Niagara (Sil.) 



Twentieth Ann. Kept. N. Y. State Cab. of Nat. Hist., Hall, 1867, 



p. 357, and Revised Edition, pa. 407. 

 Locality — Racine, Wis. 

 Type—? 



Cyrtoceras rectum Whitfield. Guelph (Sil.) 



Ann. Kept. Geol. Surv. Wis., Whitfield, 1877, p. 85. 



Geol. of Wis., Whitfield, 1882, Vol. 4, p. 319, pi. 24, figs. 6-8. 



Locality — Carlton, Wis. 



Types — Univ. of Wisconsin. 



Cyrtoceras scofieldi Clarke. Trenton (Ord.) 



Geol. and Nat. Hist. Surv., Minn., Clarke, 1S97, Vol. 3, Pt. 2, 



p. 810, pi. 59, figs. 9-11. 

 Locality — Janesville, Wis. 

 Types — Minn. State Museum. 



Cyrtoceras tenuistriatum (Hall.) Trenton (Ord.) 



Cyrtoceras corniculum, Geol. of Wis., Hall, 1862, Vol. 1, p. 41, 



figs. 1, 2. 

 Cyrtoceras tenuistriatum, Am. Pal. Fossils, Miller, 1883, p. 243. 

 Cyrtoceras tenuistriatum, Mem. Am. Mus. of Nat. Hist., Whitfield, 



1895, Vol. 1, Pt. 2, pi. 9, fig. 12. 

 Locality — Mineral Point, Wis. 

 Types — Am. Mus. of Nat. Hist. 



