SCHUCHERT.] 



INDEX AND BIBLIOGRAPHY. 277 



Orbiciila corrugata Hall=Lichenalia, a bryozoan. 

 Orbicula crassa Hall=Obolella crassa. 

 Orbicula deformata Hall = Crania deformata. 



?Orbicula excentrica Emmons. Cambrian. 



OrbicuLa excentrica Emmons, American Geology, Pt. II, 1855, p. 112, pi. 1, tig. 4. 

 Crania excentrica Miller, N. American Geol. Pal., 1889, p. 341. 

 Loc. Augusta County, Virginia. 

 Ohs. Probably a gastropod. 



Orbicula filosa Hall=Scliizocrania filosa. 



Orbicula grandis Yauuxem=E(jBmerella grandis. 



Orbicula lamellosa Hall (non Broderip)=Orbiculoidea lamellosa. 



Orbicula lodeusis Vauuxem=:Orbiculoidea lodiensis. 



Orbicula lugubris Conrad=Discinisca higubris. 



Orbicula minuta Hall=Orbiculoidea minuta. 



Orbicula multilineata Conrad=Discinisca multilineata. 



Orbicula i^armulata Hall=Orbiculoidea i)armulata. 



Orbicula prima Oweu = Lingulepis pinniformis. 



Orbicula squamiformis Hall=Pholidops squamiformis. 



Orbicula subtruncata Hall=Pliolidops subtruncata. 



Orbicula tenuilamellata nall = Schizotreta tenuilamellata. 



Orbicula terminalis Emmons =Trematis terminalis. 



Orbicula truncata Emmons=Orbiculoidea lamellosa. 



ORBICULOIDEA d'Orbigny. Genotype Orbicula morrisi Davidson. 



Orbiculoidea d'Orbigny, Prodrome de Paloontologie stratigraphique, I, 1850, p. 

 44.— Dall, Bull. Mus. Comp. Zool., Ill, 1871, p. 37;— American Jour. Conch., 

 VII, 1871, p. 74.— Herrick, Bull. Denison Univ., IV, 1888, p. 12.— Hall and 

 Clarke, Pal. New York, VIII, Pt. I, 1892, p. 125, fig. 64; p. 128, fig. 160 and 

 pp. 160, 168.— Winchell and Schuchert, Minnesota Geol. Survey, III, 1893, 

 p. 363.— Hall and Clarke, Eleventli Ann. Rep. N. Y. State Geologist, 1894, 

 p. 256. 



Discina Hall (non Lamarck), Pal. New York, III, 1859, p. 159; — Sixteenth Rep. 

 N. Y. State Cab. Nat. Hist., 1863, p. 130;— Pal. New York, IV, 1867, p. 15. 



Orbiculoidea alleghania (Hall). Chemung (Dev.). 



Discina alleghania Hall, Thirteenth Rep. N. Y. State Cab. Nat. Hist., 1860, p. 



77, figs. 1, 2;— Pal. New York, IV, 1867, p. 25, fig. 1, pi. 1, fig. 17. 

 Loc. Hobbieville, Alleghany County, New York. 



Orbiculoidea ampla Hall. Oriskany (Dev.). 



Discina grandia Hall (non Vanuxem, 1842), Pal. New York, III, 1859, p. 406, pi. 



92, fig. 1. 

 Discina ampla Hall, Ibidem, corrigenda in volume with plates, 1859. 

 Orbiculoidea ampla Hall and Clarke, Pal. New York, VIII, Pt. 1, 1892, p. 127. 

 Loc. Albany County, New York; Cayuga, Ontario. 



Orbiculoidea baini (Morris and Sliarpe.) Middle Devonian. 



Orbicula baini Morris and Sharpe, Quart. Jour. Geol. Soc. London, II, 1846, p. 



277, pi. 10, fig. 5. — Sharpe and Salter, Trans. Geol. Soc. Loudon, 2d ser., VII, 



1856, p. 210, pi. 26, figs. 20-23. 

 Discina baini von Amnion, Zeits. Gessels. fiir Erdk., Berlin, XXVIII, 1893, p. 



359, fig. 4. 

 Loc. Falkland Islands; Taquarassu, Matto-Grosso, Brazil; South Africa. 



