282 SYNOPSIS OF AMERICAN FOSi^IL BRACHIOPODA. Ibull.sv.. 



Orbiculoidea tullia (TIall). Tally (Dev.). 



Discina tiillia Hall, Sixteenth Ke}). N. Y. State Cab. Nat. Hist., 1863, p. 28;— Pal. 



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

 Loc. Seneca Lake, New York. 



Orbiculoidea utahensis (Meek). Ul)])er Carboiiiferoas. 



Disciua sp. iindet.. Meek, King's U. S. Geol. Expl. lUtb Pari., IV, 1877, p. '.J'J, pi. 



10, iig. 3.  

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

 Loc. Weber Canyon, Wasatch Range, Utah. 



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



Discina vanuxemi Hall, Pal. New York, III, 1859, p. 162, pi. 8, Iig. 1. 

 Loc. Manlius-square, New York; Arisaig, Nova Scotia (Ami). 



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



Discina varsovieusis Worthen, 15ull. Illinois State Mus. Nat. Hist., 2, 1884, p. 



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

 Loc. Warsaw, Illinois. 



ORISKANIA Hall and Clarke. Genotype O. iiavicella H. and 0. 



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 Hudson, New York. 



ORTHIDIUM Hall and Clarke. Genotype Orthis gemmicula Billings. 



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

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



Orthidium gemmicula (Billings). Calciferous (Oid.). 



Orthis gemmicula Billings, Pal. Fossils, I, 1862, p. 75, fig. 68. 

 Orthidium gemmicula 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 Brachiopoda of the 

 Ohio Valley, 1887, p. 18.— Herrick, Bull. Deuison University, lA^ 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, pp. 185, 186;— Eleventh Ann. Rep. N. Y. State 

 Geologist, 1894, p. 264. 



ORTHIS Dalmau (emend Hall and Clarke). 



Genoty])e Orthis calligramma Dalnian. 



Orthis Dalman, Kongl. Svenska Vet.-Akad. Handl., for 1827, 1828, pp. 9.3, 96.— Hall 



and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 192.— Winchell and Schu- 



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



Ann. Rep. State Geologist, 1894, p. 265. 



Orthis tequivalvis Hall, 18J:7=Plectorthis a^qnivalvis. 

 Orthis jequivalvis Hall, 1857 (non 1847) = Ortliis eryna. 

 Orthis requivalvis Shaler (non Han) = Rhipidoniella nberis. 



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



Orthis ? acuminata Billings, Canadian Nat. Geol., IV, 1859, p. 410, fig. 19. 

 Orthis acuminata Billings, Geol. Canada, 1863, p. 130, fig. 59. 

 ioc. Caughuawaga, Canada. 



