SCHCCHERT.] 



INDEX AND BIBLIOGRAPHY. 293 



Orthis (?) sulivanti Morris and Sharpe. Lower Devoiiiau. 



Orthis suliviiuti Morris imd Sliarfje, Quart. Jour. Geol. Soc. Loudou, II, 1846, p. 



275, pi. 10, tig. 1. 

 Loc. Falkland Islands ; South Africa. 



Orthis swallovi Hall = Schizopboria swallovi. 



Ortliis sweeneyi Wincliell = Diiiortliis pectiiiella sweeneyi. 



Orthis (?) tenuidens Hall. Clinton (Sil.). 



Orthis tenuidens Hall, Pal. New York, II, 1852, p. 58, pi. 20, tig. 9. 

 Loc. Oneida County, New York. 

 Ohs. May be a species of Orthothetes. 



Orthis (?) tenuis Morris and Sharpe. Lower Devonian. 



Orthis tenuis Morris and Sharpe, Quart. Jonr. Geol. Soc. London, II, 1846, p. 275, 



pi. 10, tig. 4; pi. 11, tig. 4. 

 Loc. Falkland Islands. 

 Ohs. Similar to Chonostrophia coniplanata Hall. 



Orthis (??) tenuistriata Hall. Portage (Dev.). 



Orthis tenuistriata Hall, Geol. N. Y. ; Rep. Fourth Dist., 1843, p. 245, tig. 3. 

 Loc. Shores of Crooked Lake, New York. 

 Ohs. This is not an Orthis; pi'obably a pelecypod. 



Orthis tersns Sardeson=Dalmanella tersa. 

 Orthis testudinaria Dalman=Dalmanella testudinaria. 

 Orthis testudinaria Owen, 1844=0. tricenaria. 

 Orthis thiemii White=Rhipidoniella thieiliei. 

 Orthis tioga Hall=Schizophoria tioga. 



Orthis tricenaria Conrad. Trenton (Ord.). 



Ortbis tricenaria Conrad, Proc. Acad. Nat. Sci. Philadelphia, I, 1843, p. 333. — 

 Hall, Pal. New York, I, 1847, p. 121, pi. 32, fig. 8.— Salter, Canadian Organic 

 Remains, Decade 1, 1859, p. 39, pi. 9, tigs. 1-4.— Hall, Geol. Wisconsin, I, 1862, 

 p. 42, tigs. 8-11.— Billings, Geol. Canada, 1863, p. 167, fig. 151.— Hall, Second 

 Ann. Rep.N. Y. State Geol., 1883, pi. 35, tigs. 1-5.— fWalcott, Mon. IT. S. Geol. 

 Survey, VIII, 1884, p. 74, pi. 11, tig. 4.— Hall and Clarke, Pal. New York, VIII, 

 Pt. I, 1892, pp. 191, 193, 221, 228, pi. 5, figs. 9-14.— Winchell and Schuchert, 

 Minnesota Geol. Survey, III, 1893, p. 418, pi. 32, figs. 18-23.— Keyes, Geol. 

 Survey Missouri, V, 1895, p. 60, pi. 39, fig. 4.— Whiteaves, Pal. Foss., Ill, Pt. 

 Ill, 1897, p. 175. 



Orthis disparilis Conrad, Proc. Acad. NaL Sci. Philadelphia, I, 1843, p. 333. — 

 Hall, Pal. New York, I, 1847, p. 119, pi. 32, fig. 4.— Billings, Canadian Nat. 

 Geol., IV, 1859, p. 440, fig. 20.— Hall, Geol. Wisconsin, I, 1862, p. 435.— Bill- 

 ings, Geol. Canada, 1863, p. 130, fig. 60.— Hall and Clarke, Pal. New York, 

 VIII, Pt. I, 1892, pp. 191, 221, 228. 



Orthis testudinaria? Owen, Geol. Expl. Iowa, Wisconsin, and Illinois, 1844, pi. 

 15, fig. 11. 



?Orthis plicatella White (non Hall), AVheeler's Expl. and Survey west 100th 

 Merid., IV, 1875, p. 72, pi. 4, fig. 10. 



Loc. Mineral Point, Wisconsin; Middleville, etc.. New York; Kentucky; Ten- 

 nessee; near Ottawa and Montreal, Canada; Mingan Islands; Lake Winni- 

 peg, Manitoba ; White Pine and Eureka districts, Nevada ; Minneapolis, etc., 

 Minnesota; Pike County, Missouri. 



Ohs. O. plicatella White and O. tricenaria Walcott may prove to be distinct 

 from O. tricenaria Conrad. 



