282 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. I boll. 87. 



Orbiculoidea tuUia (Hall), Tally (Dev.). 



Discina tullia Hall, Sixteenth Rep. N. Y. State Cab. Nat. Hist., 1863, p. 28;— Pal. 



New York, IV, 1867, p. 22, pi. 2, ligs. 16, 17. 

 Loc. Sciu'ca Lake, New York. 



Orbiculoidea utahensis (Meek). U])])ei' Carboniferous. 



Disi'ina sp. iindct., Meek, King's U. S. Geol. Expl. 40th Pari., IV, 1877, p. 99, pi. 



10, lig. 3. 

 Discina ntahensis Meek, Ibidem, 1877, p. 99 (also see footnote, p. 9). 

 hoc. Weber Canyon, Wasatch Range, Utah. 



Orbiculoidea vanuxemi (Plall). Arisaig and Waterlime (Sil.). 



Discina vannxemi Hall, Pal. New York, III, 1859, p. 162, pi. 8, fig. 1. 

 hoc. Manlins-sqnare, Now York; Arisaig, Nova Scotia (Ami). 



Orbiculoidea varsaviensis (Wortheu), Keokuk (L. Carb.). 



Discina Aarsovicnsis AVorthen, ]5ull. Illinois State Mus. Nat. Hist., 2, 1881, p. 



23;— Geol. Survej' Illinois, VIII, 1890, p. 102, pi. 11, fig. 7. 

 Loc. Warsaw, Illinois. 



ORISKANIA Hall and Clarke. Genotype O. navicella H. and C. 



Oriskania Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 270;— Thirteenth 

 Ann. Rep. N. Y. State Geologist, 1895, p. 854. 



Oriskania navicella Hall and Clarke. Oriskany (Dev.). 



Oriskania navicella Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 269, 



figs. 181-183, pi. 79, figs. 25-27. 

 Loc. Near Ilndson, New York. 



ORTHIDIUM Hall and Clarke. Genotype Ortliis gemmicula Billinjjs. 



Ortbidiiini Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 244;— Eleventh 

 Ann. Rep. N. Y. State Geologist, 1894, p. 276. 



Orthidium gemmicula (Pollings). Calciferous (Ord.). 



Orthis geniniicula Pillings, Pal. Fossils, I, 1862, p. 75, fig. 68. 



Orthidium gcmmicnla Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 



217, 244, pi. 7A, figs. 22-25. 

 Loc. Point Levis, Canada. 



Orthis of authors. 



Orthis Hall, Pal. New York, IV, 1867, p. .33.— Shaler, Fossil Hrachioj.oda of the 

 Ohio Valley, 1887, p. 18.— Herrick, Pull. Donison University, IV, 1888, p. 

 14. — Nettelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, 

 p. 34.— Hall, Bull. Geol. Soc. America, I, 1889, p. 19.— Hall and Clarke, Pal. 

 New York, VIII, Pt. I, 1892, i)p. 185, 186;— Eleventh Ann. Re]>. N. Y. State 

 Geologist, 1894, p. 264. 



ORTHIS Dalraan (emend Hnll and Clarke). 



(icnotyjie Orthis calligraninia Dalnian. 



Orthis I )alman, Kongl. Svenska Vet.-Akad. Handl., fdr 1S27, 1828, pp. 93, 96.— Hall 

 and Clarke, Pal. New York, VIII, Pt. I, 1892, ]•. 192.— Wiuchell and Schu- 

 chert, "Minnesota Geol. Survey, III, 1893, p. 417.— Hall and Clarke, Eleventh 

 Ann. Rep. State (Jeologist, 1894, p. 265. 



Orthis aequivalvis Hall, 1847 = Plectorthis a3quivalvis. 



Orlhis a'quivalvis Hall, 1857 (non 1847) = C)rthis eryna. 



Orthis jcquivalvi.s Shaler (non Hall) = llhi])i<loniella nberis. 



Orthis (?) acuminata Billings. Chazy (Ord.). 



Orthis ? acuminata IJillings, Canadian Nat. Geol., IV, 18.59, ]>. 410, fig. 19. 

 Orthis acuminata P.illings, (ieol. Canada, 1863, p. 130, fig. 59. 

 Loc. Caughnawaga, Canada. 



