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



Ehipidomella (?) cuneata (Owen). Hamilton (Dev.). 



Ortlus cimeata Owen, Geol. Survey Wisconsin, Iowa, and Minnesota, 1852, p. 



585, pi. 3A, fig. 10. 

 Rhipidoinella cuneata Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 225. 

 Loc. Now Buffalo, Iowa 



Rhipidomella cyclas Hall. Marcellus and Hamilton (Dev.). 



Orthis cyclas Hall, Thirteentli Rep. N. Y. State Cab, Nat. Hist., 1860, ]>. 7S;— 



Pal. New York, IV, 1867, p. 52, pi. 7, ligs. 2, 3. 

 Rhipidomella cyclas Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 225. 

 Jmc. York, Pavilion, Bellona, etc., New York. 



Rhipidomella dalyana (Miller). Burlington (L. Carb.). 



Ortbis <lalyana Miller, .lour. Cincinnati Soc. Nat. Hist., IV, 1881, p. 313, pi. 7, lig. 8. 



Rhipidomella dalyana Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 225. 



Loc. Lake Valley mining district. New Mexico. 

 Rhipidomella discus Hall. Lower Helderberg (Dev.). 



Orthis discus Hall, Pal. New York, III, 1859, p. 165, pi. lOA, figs. 7-12. 



Rhipidomella discus Hall and Clarke, Ibid.m, VIII, Pt. I, 1892, pp. 210, 225. 



Loc. Hudson, Catskill, etc., New York; Square Lake, Maine. 



Rhipidomella dubia Hall. St. Louis (L. Garb.). 



Orthis dubius Hall, Trans. Albany Institute, IV, 1858, p. 12.— Whitfield, Bull. 



American Mus. Nat. Hist., I, 1882, p. 45, pi. 6, figs. 1-5.— Hall, Twelfth Rep. 



State Geol. Indiana, 1883, p. 324, pi. 29, figs. 1-5. 

 Ortbis cooperensis Swallow, Trans. St. Louis Acad. Sci., II, 1863, p. 82. 

 Rhipidomella dubia Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 210, 



22.-), j.l. 6 A, figs. 18-22. 

 Orthis dubia Keyes, Geol. Survey Missouri, \, 1895, p. 64. 

 Loc. Sporgen Hill and Bloomiugton, Indiana; Alton, Appanoose, etc., Illinois; 



Boonville and Barretts Station, Missouri; Keokuk, Iowa; Caldwell County, 



Kentucky. 

 01>s. Typical examples of R. cooperensis have been studied in Professor Hall's 



collection. 



Rhipidomella eminens Hall. Lower Helderberg (Dev.). 



Orthis eminens Hall, Tenth Rep. N. Y. State Cab. Nat. Hist., 1857, p. 42, figs. 



I, 2;— Pal. New York, III, 1859, p. 167, pi. 11, ligs. 7-14. 



Rhii)idomella eminens Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, pp. 



210, 225. 

 Loc. Schoharie, Carlisle, etc.. New York. 



Rhipidomella goodwini (Nettelroth). Hamilton (Dev.). 



Ortliis goodwini Nottelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. Sur- 

 vey, 1889, ]). 89, pi. 17, figs. 30-32. 

 Loc. Falls of Ohio. 

 Rhipidomella hartti (Rathbun). Middle Devonian. 



Ortbis hartti Rathbun, Proc. Boston Soc. Nat. Hist., XX, 1879, p. 23. 

 Loc. Province of Para, Brazil. 

 Rhipidomella hybrida (Sowerby). Niagara (Sil.). 



Orthis hybrida Sowerby, Murchison's Silurian System, 1839, p. 630, pi. 13, lig. 

 11.— Hall, Geol. N. Y. ; Rep. Fourth Dist., 1843, p. 105, fig. 7 ;— Pal. New York, 



II, 1852, p. 253, pi. .52, fig. 4.— Roemer, Die Silurische Fauna des West. Ten- 

 nessee, 1860, p. 63, pi, .5, fig. 6.— Meek and Worthen, Geol. Survey Illinois, 

 1868, p, 371, pi. 7, tig. 7.— Hall, Twenty-eighth Rep. N, Y. State Mus. Nat. 

 Hist., 1879, p. 149, pi. 21, figs. 18-25;— Eleventh Rep. State Geol. Indiana, 

 1882, p. 285, pi. 21, figs. 18-25 ;— Second Ann. liep. N. Y, State Geol., 1883, pi. 36, 



