204 sYNorsis of American fossil brachiopoda. (nuLug?. 



Orthis (?) trinucleus Hall. Clinton (Sil.). 



Orthis triimclous Hull, Pal. New York, II, 1852, p. 58, pi. 20, fij;. 8. 

 Loc. Wayne Count v, New York. 



Ortbis triplicatella Meek=Plectorthis triplicatella. 



Orthis (?) tritonia Billings. Calciferous (Ord.). 



Orthis tritonia Billings, Pal. Fossils, I, 1862, p. 76, fig. 69;— Geol. Canada, 1863, 

 p. 231, fig. 2U.— Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 217, 

 pi. 7A, figs. 12, 13. 



Loc. Point Levis, (Canada. 



Orthis tubiilostriata 11 all =Jiliipidomella tubulistriata. 



Orthis tulliensis Yaniixem=Scliizophoria tulliensis. 



Orthis uberis Billings=lihipidoniella uberis. 



Orthis umbonata Conrad =Amboc(jelia umbonata. 



Orthis iinibracalum Owen (non von Buch)=Derbya robusta. 



Orthis iimbraculum Hall, 1852, aSTewberry, 1861=Orthothetes nmbrac- 



ulum, 

 Orthis imguiculus Hall, 1843 (non Phillips) =Ambocoelia gregaria. 

 Orthis iinguiformis Castelnau, and p]nimons=Hipparionyx proximus. 

 Orthis vannxemi Hall=Rhipidomella vanuxenii. 



Orthis vanuxemi pulchella Herrick=Rhipidoniella vanuxemi pulchella. 

 Orthis varica Conrad =Bilobites varicns. 

 Orthis vespertilio Sowerby. Ordovician. 



Orthis vespertilio (Sowerby) Kayser, Pala'ontograiihica, Snppl., Ill, 1876, p. 27, 

 pi. 3, figs. 22, 23. 



Loc. Enrope; Potrero de los Angulos, etc., Argentine Republic. 



Orthis whittieldi IST. H. Wiiichell=Plectorthis whitfleldi. 



Orthisina d'Orbigny=Clitambonites. 



Orthisiiia alberta Walcott=l>illingsella alberta. 



Orthisina alternata Hall=Orthothetes cheinnngensis perversus. 



Orthisina americana Whitfield =Clitanibonites diversus. 



Orthisina arctostriata Hall = Orth()thetes chemvingensis arctistriatus. 



Orthisina crassa Meek and Hayden=Derbya crassa. 



Orthisina diversa Shaler=Clitambonites diversus. 



Ortiiisina festinata Billings=]>illingsella festinata. 



Orthisina grandreva Billings=Billingsella grandteva. 



Orthisina niissouriensis Swallow =Meekella striaticostata. 



Orthisina transversa Walcott=Billingsella transversa. 



Orthisina verneuili Billiugs=Clitambonites diversus. 



ORTHORHYNCHULA Hall and C. Genotype Orthis ( ?) linueyi James. 



Orthorhynchiila Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 181;— Thir- 

 tocntli Ann. Rep. N. Y. State Geologist, 1895, p. 824. 



Orthorhynchula linneyi (James). Lorraine (Ord.). 



Orthis ( ?) linneyi .lames, The Paleontologist, 5, 1881, p. 41. 

 Orthis linneyi Nettelroth, Kentucky Fossil Shells, ^em. Kentucky Geol. Survey, 



1889, ]). 41, pi. 34, ligs. 7-18; errata, p. 1. 

 Ortliorhyncliula linneyi Hall and Chirke, Pal. New York, VIII, Pt. II, 1893, p. 



181, pi. .56, tigs. 10-13, 19. 

 IjOC. Near Danville, etc., Kentucky; (.'incinnati, Oliio; Nashville, Tennessee. 



