290 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



Ortliis oblata einargiuata Hall— Kliipicloiuella oblata emarginata. 



Orthis obtusa Pander. Ordovician. 



Ortbis obtusa (Pauder) Kayser, Paljcontographica, Suppl., Ill, 1876, p. 19, pi. 3, 



figs. 1,2. 

 Loc. Europe; Cordillere San .Tuan, Argentine Kepnblic. 



Ortliis occasus Hall=KliipidomelIa occasus. 



Orthis occideiitalis nall=Hebertella occideutalis. 



Ortliis ortbamboiiites Billiugs=0. pauderiaiia. 



Orthis palmata Sharpe and Salter =Aiioplotheca liabellites. 



Orthis pandcriana Hall and Clarke. Calciferous (Ord.). 



Orthis orthambouites Billings (non Murcbison and de Verneuil), Pal. Fossils, I, 

 18G2, p. 77, fig. 70;— Geol. Canada, 1863, p. 231, tig. 245.— Scbuchert, Ninth 

 Ann. Rep. N. Y. State Geo!., 1890, p. 43.— Hall and Clarke, Pal. New York, 

 VIII, Pt. I, 1892, pp. 221, 228, pi. 5, figs. 1-3.— Matthew, Trans. Royal Soc. 

 Canada, X, 1893, p. 101, pi. 7, fig. 4. 



Ortbis pauderiana Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pi. 5, 

 footnote. 



Loc. Point Levis and St. John, Canada. 



Ortbis parva de Verneuil=Dalinauella elegantula. 

 Ortbis pecosi Marcou=E.bipidomella pecosi. 



Orthis (?) pectinata d'Orbigny. Devonian. 



Ortbis pectinatus d'Orbigny, Voyage dans I'Am^rique M^ridionale, Pal., 1842, 



p. 39. 

 Spirifer pectinatns d'Orbigny, Ibidem, 1842, pi. 2, figs. 13-15. 

 Loc. Lake Titicaca, Bolivia. 

 Ohs. Probably a species of Ortbothetes. 



Ortbis pectiuella Emmons=Dinortbis pectinella. 



Ortbis pectinella Wbittield, 1882=Plectortbis wbitfieldi. 



Ortbis pectinella semiovalis Hall=Dinortbis pectinella. 



Ortbis pednncularis Hall=Scbizopboria peduncularis. 



Ortbis peloris Hall=Ebipidouiella peloris. 



Ortbis penelope Hall=Rbipidome]la penelope. 



Ortbis penniaua Derby =Rbipidomella penuiana. 



Ortbis pennsylvanica Simpson =Rbipidoinella pennsylvauica. 



Ortbis pepina Hall=Billingsella coloradoensis. 



Ortbis i)erelegans Hall=Dalmanella perelegans. 



Ortbis perversa Hall=Ortbotbetes cbemungensis perversus. 



Ortbis perveta Courad=Dalmanella sub«qiiata pervetus. 



Ortbis perveta Hall, 18S3=Dalmanella suba;quata. 



Ortbis petr* Sardeson=Dinortbis proavita. 



Orthis ( ?) pigra Billings. Cbazy (Ord.). 



Orthis piger Billings, Canadian Nat. Geol., IV, 1859, p. 442. 

 Loc. Mingan Island. 

 Ohs. This species is probably congeneric witb Billingsella graudseva. 



Ortbis pisum Hall (non Murcbison) =Nucleospira pisiformis. 

 Ortbis plana Castelnau (non Pander)=Rafinesquina alternata. 

 Ortbis planoconvexa Hall=Dalmanella ])laniconvexa. 

 Ortbis platys Billings =Dinortbis platys. 

 Ortbis plicata Vanuxein= Spirifer vanuxemi. 



