1911] Teller, Fossils from the Palaeozoic Formation*. 263 



Wanus ioxus Hall. Niagara (Sil.) 



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



p. 378j pi. 22 (13.), figs. 4-10. 

 Geol. of Wis., Whitfield, 1882, Vol. 4. p. 304, pi. 21, figs. 11, 12. 



Obs. Among the types are two specimens said to have 



been collected at Wauwatosa, Wis. In over thirty 



years collecting at that locality, we have never seen 



or heard of a specimen of this species collected there. 



LocalityRacine and Waukesha, Wis. 



Types — Am. Mus. of Nat. Hist. 



II la.- nus madisoniaims Whitfield. Niagara (Sil.) 



Illomus niagarensis, Ann. Kept. Wis. Geol. Surv., Whitfield, 1879, 



p. 68. 

 IlUrtius niagarensis, Geol. of Wis., Whitfield, 1882, Vol. 4, p. 307, 



pi. 20, figs. 8, 9. 

 Prof. Whitfield says : The specific name of this species was 

 changed by request of the Wisconsin Geological Survey. 



Obs. It is known that the type specimen of this species 

 was collected by the late Dr. Fisk H. Day of Wauwa- 

 tosa, Wis., at that locality* 

 Locality — Wauwatosa, Wis. 

 Type — Univ. of Wisconsin. 



llkenus niagaresnsi» Whitfield = Illamus madisonianus. 



Illaenus ovatus (Conrad.) Trenton (Ord.) 



Thalopsf ovatus, Proc. Acad. Nat. Sci., Phila., Conrad, 1843, Vol. 1, 



p. 332. 

 Ilia nus ovatus, Pal. of N. Y., Hall, 184:;. Vol. 1, p. 259, pi. 67, 



figs. 6a, b. 

 Illamus ovatus, Geol. of Wis., Whitfield, 1883, Vol. 4, p. 238, pi. 5, 



figs. 1, 2. 

 Locality — Mineral Point, Wis. 

 Types — Am. Mus. of Nat. Hist. 



Illaenus pterocephalus Whitfield. Niagara (Sil.) 



Ann. Eept. Geol. Surv. Wis., Whitfield, 1877, p. 87. 



Geol. of Wis., Whitfield, 18S2, Vol. 4, p. 309, pi. 20, figs. 10-12. 



Locality — Pewaukee, Wis. 



Types — Univ. of Wisconsin. 



