276 SYNOPSIS OF AMERICAN FOSSIL BKACHIOPODA. (bull. 87. 



Obolella polita 11 all — Continued. 



Obolella polita Whitfield, Powell's Geol. Geoj^r. Survey Kocky Mountain Region, 

 1880, p. 33J), pi. 2, ligs. 12, 13.— W.ilcott, Bull. U. S. Geol. Survey, 30, 1886, 

 p. 111.— Ilnll and Clarke, Pal. New York, VIIT, Pt. 1, 1892, pi. 2, figs. 37-41. 



Lo<\ Treiui)eale;ni, Wiseonsin ; Black Hills, South Dakota. 



Obolella pretiosa Bi]lings=Linnarssonia pretiosa. 

 Obolella prima Wliitfield=Lingulepis prima. 

 Obolella transversa lIartt=Liunarssonia transversa. 

 Obolcllina Billings =Dinobolus. 



Obolellina canadensis Billings =l)inobolus canadaensis. 

 Obolellina galtensis Billings=liliiuobolus galtensis. 

 Obolellina magnifica Billings =Diuobolus magniflcus. 



OBOLUS Eicbwald. Genotype Obolus appolinus Eichwald. 



Obolus Eichwald, Zoologia Specialis, I, 1829, p. 274.— Hall and Clarke, Pal. New 

 York, YIII, Pt. I, 1892, p. 80, figs. 33, 34 ; pp. 164, 337.— Matthew, Trans. Royal 

 Soc. Canada, IX, 1892, p. 43.— Mickwitz, MtSm. I'Acad. Imp. Sci. St. P6ter8- 

 bourg, VIII, 1896, pp. 25, 126. 



Euobolus Mickwitz, M<Sm. I'Acad. Imp. Sci. St. Pdtersbourg, VIII, 1896, pp. 25, 

 129, 133. 



Ohs. Both liuobolus and Obolus are based \\\m\\ the same species. 



Obolus appolinus Owen (non Eichwald) =Obolella polita. 

 Obolus canadensis Billings, 1858=Dinobolus magnificus. 

 Obolus canadensis Billings =Dinobolus canadaensis. 

 Obolus conradi nall=Dinobolus conradi. 

 Obolus galtensis Billings=Eliiuobolus galtensis. 

 Obolus labradoricus Billings = Ipliidea labradorica. 



Obolus (?) major Mattbew. Lower Cambrian. 



Obolus? major Matthew, Trans. Royal Soc. Canada, IV, 1890, p. 155, pi. 8, tig. 3. 

 Mickwitzia (?) major Mickwitz, M6m. I'Acad. Imp. Sci. St. P^tersbourg, VIII, 



1896, p. 23. 

 Loc. Near St. John, New Brunswick. 



Obolus (?) murrayi Billings. Cambrian. 



Obolus? murrayi Billings, Pal. Fossils, I, 1865, p. 362. 

 Loc. Hare Bay, Newfoundland. 



Obolus ? pectenoides Whitfield = Obolella pectinoides. 

 Obolus pulcher Matthew =Botsfordia pulchra. 



Obolus pristinus Matthew. ? Middle Cambrian. 



Obolus pristinus Matthew, Trans. N. Y. Acad. Sci., XIV, 1895, p. 121, pi, 4, fig. 1. 

 Loc. Hanford Brook, New Brunswick. 



Obolus (?) refulgens Matthew. Middle Cambrian. 



Obolus refulgens Matthew, Trans. Royal Soc. Canada, IX, 1892, p. 44, pi. 12, 

 figs. 6a-6d. 



Obolus ( ?) refulgens Mickwitz, M6m. I'Acad. Imp. Sci. St. P<5tersbourg, VIII, 1896, 

 p. 23. 



Loc. Near St. John, New Brunswick. 

 CEhlertella Hall and Clarke =Lingulodiscina. 

 Orbicula Cuvier=: Crania. 

 Oibicula Sowerby, 1830=Discina. 

 Orbicula cailata HaU=Lingule]la c;clata, 



