880 BULLETIN 02, UNITED STATES NATIONAL MUSEUM. 



Ophileta sordid a Lesley. See Maclurites sordida. 



Ophileta sublaxa Miller. See Ophiletina sublaxa. 



Ophileta uniangulata Billings. See Ophileta bella. 



OPHILETINA Ulrich and Scofield. Genotype: O. sublaxa Ulrich and Scofield. 



Ophiletina Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 1028.— Grabau 

 and Shimer, N. A. Index Fossils, 1, 1909, p. 657. 



Ophiletina angularis Ulrich and Scofield. 



Ophiletina angularis Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 1031, 



pi. 74, figs. 43-46. 

 Ophileta angularis Miller, N. A. Geol. Pal., 2d App., 1897, p. 769 (gen. ref.). 

 Black River (Decorah): Near Cannon Falls, Minnesota. 

 Holotype — Cat. No. 45946, U.S.N.M. 



Ophiletina sublaxa Ulrich and Scofield. 



Ophiletina sublaxa Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 1897, p. 1030, 



pi. 74, figs. 40-42 and 47.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, 



p. 657, fig. 906a, b. 

 Ophileta sublaxa Miller, N. A. Geol. Pal., 2d App., 1897, p. 769 (gen. ref.). 

 Black River (Platte ville): Minneapolis, Minnesota; Mineral Point, Wisconsin; 



Dixon, Illinois. 

 Cotypes — Cat. No. 45947, U.S.N.M. 



Ophiletina sublaxa depressa Ulrich and Scofield. 



Ophiletina sublaxa var. depressa Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 



1897, p. 1030, pi. 74, fig. 42. 

 Stones River (Murfreesboro) : Murfreesboro , Tennessee. 

 Holotype.— Cat. No. 46070, U.S.N.M. 



Ophiletina sublaxa sequens Ulrich and Scofield. 



Ophiletina sublaxa var. sequens Ulrich and Scofield, Geol. Minnesota, 3, pt. 2, 



1897, p. 1031. 

 Trenton (Prosser) : Wykoff, Minnesota 

 Holotype.— Cat. No. 45948, U.S.N.M. 



OPISTHOPTERA Meek. 



Genotype: Ambonychia (Megaptera) casei Meek and Worthen. 

 Opisthoptera Meek, Proc. Acad. Nat. Sci. Philadelphia, 1872, p. 320, footnote; 

 Geol. Surv. Ohio Pal., 1, 1873, p. 131, footnote. — White, Anier. Jour. Sci. 

 Arts, 3d ser., 9, 1875, pp. 318-320.— Ulrich, Geol. Surv. Ohio, 7, 1893, p. 

 642.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 982. 

 Megaptera Meek and Worthen, Proc. Chicago Acad. Nat. Sci., 1, 1866, p. 22. 

 (Not Megaptera Gray, 1846.) — White, Cincinnati Quart. Jour. Sci., 1, 1874, p. 

 326.— Zittel, Handb. Pal., 2, 1881, p. 36. 



Opisthoptera alternata Ulrich. 



Opisthoptera alternata Ulrich, Geol. Surv. Ohio, 7, 1893, p. 644, pi. 49, figs. 9-11. 

 Richmond (Waynesville) : Waynesville, Ohio. 

 Cotypes.— Cat. No. 46262, U.S.N.M. 



Opisthoptera ampla Ulrich. 



Opisthoptera ampla Ulrich, Geol. Surv. Ohio, 7, 1893, p. 647, pi. 47, fig. 7. 

 Maysville (Fairmount): Cincinnati, Ohio. 

 Holotype.— Oat. No. 46263, U.S.N.M. 



