920 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Orthodesma ashmani Miller and Faber. See Rhytimya radiata. 



Orthodesma byrnesi Miller. See Rhytimya byrnesi. 



Orthodesma canaliculatum Ulrich. 



Orthodesma canaliculatum Ulrich, Geol. Minnesota, 3, pt. 2, 1894, p. 520, pi. 37 



figs. 7-11— Weller, Geol. Surv. New Jersey Pal., 3, 1903, p. 171, pi. 11, fig. 



5.— Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, p. 1012, 



pi. 47, figs. 4, 4b.— Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 380, 



figs. 482d-e. 

 Richmond: Spring Valley, Minnesota; Ohio and Indiana. 

 ?Trenton: Jacksonburg, New Jersey. 

 Cotypes — Cat. Nos. 46271, 46272, U.S.N.M. 



Orthodesma contractual (Hall). 



Orthonota contracta Hall, Pal. New York, 1, 1847, p. 300, pi. 82, figs. 8a, b.— 



Pictet, Traite de Pal., 2d ed., 3, 1855, p. 571, pi. 80, fig. 27.— Emmons, Amer. 



Geol., 1, pt. 2, 1855, p. 174.— Miller, Cincinnati Quart. Jour. Sci., 1, 1874, 



p. 222. 

 Orthodesma contractum Hall and Whitfield, Geol. Surv. Ohio, Pal., 2, 1875, p. 



96, pi. 2, figs. 4, 5.— Lesley, Geol. Surv. Pennsylvania, P 4, 1889, p. 563, figs. 

 Maysville: Cincinnati, Ohio. 

 Plastotype.— Cat. No. 46751, U.S.N.M. 



Observation. — Possibly the same as Rhytimya iniekelboroughi (Whitfield). 



Orthodesma cuneiforme Miller. See Sphenolium cuneiforme. 



Orthodesma curtum (Hall). 



Orthonota curta Hall (not Hall, 1852), Geol. Rep. 4th Dist., New York, 1843, p. 



76, fig. 1, tab. ill. 8, fig. 1.— Owen, Amer. Jour. Sci. Arts, 48, 1845, p. 306, fig. 



1.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 567, fig. 

 Orthodesma curtum Whitfield and Hovey, Bull. Amer. Mus. Nat. Hist., ll,pt.2, 



1899, p. 160 (gen. ref.). 

 Clinton: Walcott, New York. 



Orthodesma curvatum (Hall and Whitfield). 



Orthodesma curvata Hall and Whitfield, Geol. Surv. Ohio, Pal., 2, 1875, p. 95, pi. 



2, fig. 6.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 563, fig. 

 Richmond (Waynesville) : Near Way nesville, Ohio. 



Orthodesma cylindricum Miller and Faber. See Cymatonota cylindrica. 



Orthodesma cymbula Miller and Faber. See Rhytimya mickleboroughi. 



Orthodesma ellipticum Miller. See Psiloconcba elliptica. 



Orthodesma faberi Miller. See Rhytimya faberi. 



Orthodesma grande Miller. See Psiloconcha grandis. 



Orthodesma mickleboroughi Whitfield. See Rhytimya mickleboroughi. 



Orthodesma minimum Miller. See Psiloconcha minima. 



Orthodesma minnesotense Miller. See Psiloconcha minnesotensis. 



Orthodesma minnesotense Ulrich. 



Orthodesma minnesotense Ulrich, 19th Ann. Rep. Geol. Nat. Hist. Surv. Minne- 

 sota, 1892, p. 228, fig. 14; Geol. Minnesota, 3, pt. 2, 1894, p. 517, pi. 37, figs. 

 12 and 14. 

 Black River (Decorah): St. Paul, Minnesota. 

 Tlolotype — Cat. No. 46273, U.S.N.M. 



