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



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



Orthis ciiueatii Owen, Cieol. Survey Wisconsin, Iowa, and Minnesota,, 1852, p. 

 585, pi. 3A, iig. 10. 



Khipidomella cuneata Hall and Clarke, Pal. New York, VIII, Ft. I, 1«92, p. 225. 



Loc. New Buffalo, Iowa 

 RMpidomella cyclas Hall. Marcellns and Hamilton (Dev.). 



Orthis cyclas Hall, Thirteenth Rep. N. Y. State Cab. Xat. Hist., 18G0, p. 78;— 



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

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

 Loc. York, Pavilion, Bellona, etc., New York. 



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



Orthis dalyana Miller, Jour. Cincinnati Soc. Nat. Hist., IV, 1881, p. 313, pi. 7, fig. 8. 

 Rhipidomella dalyana Hall and Clarke, Pal. New York, yj^II, 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, Ibidom, VIII, Pt. I, 1892, pp. 210, 225. 

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



Rhipidomella duhia Hall. St. Louis (L. Carb.). 



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. 

 Orthis 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, 



225, pi. 6A, figs. 18-22. 

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

 Loc. Spergen Hill and Bloomington, Indiana; Alton, Appanoose, etc., Illinois; 



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



Kentucky. 

 Ois. 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. 



1,2;— Pal. New York, III, 1859, p. 167, pi. 11, figs. 7-14. 

 Rhipidomella eminens Hall and Clarke, Pal. New Y'ork, VIII, Pt. I, 1892, pp. 



210, 225. 

 Loc. Schoharie, Carlisle, etc., New Y'ork. 



Rhipidomella goodwini (Xettelroth). Hamilton (Dev.). 



Orthis goodwini Nettelroth, Kentucky Fossil Shells, Mem. Kentucky Geol. Sur- 

 vey, 1889, p. 39, pi. 17, figs. 30-32. 

 Loc. Falls of Ohio. 



Rhipidomella hartti (Rathbun). " Middle Devonian. 



Orthis 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, fig. 

 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, fig. 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. Rep. N. Y. State Geol., 1883, pi. 36, 



