212 Bulletin Wisconsin National History Society. [Vol. 9, No. 4. 



Obolus (Trimerella ?) conradi. Meek and Worthen = Dinobolus 



conradi. 

 Orbicula prima Owen = Lingulepis pinniformis. 



Orbiculoidea marginalis Hall and Clarke = Lingulodiscina marginalia. 



Orbiculoidea telleri Cleland. Hamilton (Dev.) 



Wis. Geol. and Nat. Hist. Surv., Cleland, 1911, Bull. 21, p. 85, pi. 12, 



figs. 9, 10. 

 Locality — Milwaukee, Wis. 

 Types — Mil. Pub. Museum. 



Orbiculoidea wardi Cleland. Hamilton (Dev.) 



Wis. Geol. and Nat. HistrSurv., Cleland, 1911, Bull. 21, p. 85, pi. 12, 



figs. 14, 15, 16. 

 Locality — Milwaukee, Wis. 

 Types — Mil. Pub. Museum. 



Orthis barabuensis Winchell = Syntrophia barabuensis. 



Orthis bellarugosa Conrad = Hebertella bellarugosa. 



Orthis (Dinorthis. ) deflecta Winchell and Schuchert = Dinorthis 

 deflecta. 



Orthis disparilis Conrad = Orthis triccnaria. . 



Orthis flabellites var. spania Hall and Clarke. Niagara (Sil.) 



Pal. of N. Y., Hall and Clarke. 1894, Vol. 8, Pt. 2, pi. 84. fig. 10. 

 Locality — Racine, Wis. 

 Type — Univ. of Chicago. 



Orthis ? glypta Hall and Clarke. Niagara (Sil.) 



Pal. of N. Y., Hall and Clarke, 1894, Vol. 8, Pt. 2, p. 359, pi. 84, 

 figs. 8, 9. 



Obs. The locality of 0. flabellites and 0. glypta is given 

 as near Milwaukee, should be Racine. 

 Locality — Racine, Wis. 

 Types — Univ. of Chicago. 



Orthis incurvata Castelneau = Strophomena incurvata. 



