scHUCHEKT] INDEX AND BIBLIOGRAPHY. 293 



Orthis (?) sulivanti Morris and Sbarpe. Lower Devonian. 



Orthis sulivanti Morris and Sharpe, Quart. Joiir. (ieol. Soc. I.oiidou, II, 184G, ]). 



275, pi. 10, tig. 1. 

 Loc. Falkland Islands; South Africa. 



Ortbis swallovi Hall = Scbizophoria swallovi. 



"Ortliis sweeneyi Wiucbell = Dinortbis pectinella sweeneyi. 



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



Orthia tenuidens Hall, Pal. New York, II. 1852, p. 58, pi. 20, lig. 9. 

 Loc. Oueida County, New York. 

 Obs. May be a species of Orthothetes. 



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



Orthis teuuis Morris and Sharpe, Quart. Jour. Geol. Soc. Londou, II, 1846, p. 275, 



pi. 10, fig. 4; pi. 11, fig. 4. 

 Loc. Falkland Islands. 

 Obs. Similar to Chonostrophia complanata Hall. 



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



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

 Loc. Shores of Crooked Lake, New York. 

 Ofc.s. This is not an Orthis; probably a pelecypod. 



Ortbis tersns Sardeson=Dalmaiiella tersa. 

 Orthis testudinaria Dalman=Dalmanella testudinaria. 

 Ortbis tei^tndinaria Owen, 1844 =0. tricenaria. 

 Ortbis tbiemii Wbite=Rbipidomella tbieniei. 

 Ortbis tioga Hall=Scbizopboria tioga. 



Orthis tricenaria Conrad. Trenton (Ord.). 



Orthis 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, figs. 1-4.— Hall, Geol. Wisconsin, I, 1862, 

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

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

 Survey, VIII, 1884, p. 74, pi. 11, fig. 4.— Hall and Clarke, Pal. New Y'ork, 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 C!onrad, Proc. Acad. Nat. 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, \>\. 

 15, fig. 11. 



? Orthis plicatella White (non Hall), Wheeler'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 Couuty, Missouri. 



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

 from O. tricenaria Conrad. 



