886 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Orthis of authors — Continued. 



Vermont, 1, 1862, p. 294. — Chapman, Expos. Min. Geol. Canada, 1864, p. 

 114.— Hall, Pal. New York, 4, 1867, p. 33.— Miller, Cincinnati Quart. Jour. 

 Sci., 2, 1875, pp. 19, 20.— Winchell, 8th Ann. Rep. Geol. Nat. Hist. Surv. 

 Minnesota, 1880, p. 63.— Zittel, Handb. Pal., 1, Munich, 1880, p. 674.— 

 Shaler, Fossil Brachiopoda of Ohio Valley, 1887, p. 18. — Herrick, Bull. Sci. 

 Lab. Denison Univ., 4, 1888, p. 14. — Nettelroth, Kentucky Foss. Shells, 

 Mem. Geol. Surv. Kentucky, 1889, p. 34.— Hall, Bull. Geol. Soc. Amer., 1. 

 1889, p. 19.— Miller, N. A. Geol. Pal., 1889, p. 356.— Hall and Clarke, Pal. 

 New York, 8, pt. 1, 1892, pp. 185, 186; 11th Ann. Rep. New York State Geol., 

 1894, p. 264.— Koken, Die Leitfossilien, Leipzig, 1896, p. 235, figs. 195, 5. 



Orthis (group of O. plicatella) Hall. See Plectorthis Hall and Clarke. 



Orthis (group of O. testudinaria) Hall. See Dalmanella Hall and Clarke. 



Orthis (Orusia) Walcott. See Eoorthis Walcott. 



Orthis (Plectorthis) Walcott. See Eoorthis Walcott. 



Orthis (Platystrophia) acuminata James. See Platystrophia acuminata. 



Orthis(?) acuminata Billings. 



Orthis? acuminata Billings, Canadian Nat. Geol., 4, 1859, p. 440, fig. 19; Geol. 

 Canada, 1863, p. 130, fig. 59.— Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 

 1889, p. 507, figs.— Raymond, Ann. Carnegie Mus., 7, 1911, p. 246, fig. 21. 

 Chazyan (Aylmer): Caughnawaga, Canada. 



Orthis (Platystrophia) acutilirata Meek. See Platystrophia acutilirata. 



Orthis acuttloba Ringueberg. See Bilobites acutilobus. 



Orthis acutiplicata Raymond. 



Orthis acutiplicata Raymond, Amer. Jour. Sci., 20, 1905, p. 370; Ann. Carnegie 



Mus., 7, 1911, p. 237, pi. 35, figs. 8-10. 

 Chazyan (Day Point): Valcour Island, New York. 



Orthis ^quivalva Shaler. See Rhipidomella uberis. 



Orthis .equivalvis Hall. See Plectorthis sequivalvis. 



Orthis alata Shaler. See Orthis flabellites. 



Orthis(?) alternans Castelnau. Not recognized. 



Orthis alternans Castelnau, Essai Syst. Sil. l'Amerique Septentrionale, 1843, 



p. 38, pi. 14, fig. 2. 

 "Erratic block, Lake of the Woods." 



Orthis amosna Winchell. See Pianodema amoena. 



Orthis annieana James. See Platystrophia annieana. 



Orthis anticostiensis Shaler. See Dinorthis (Plsesiomys) porcata anticostiensis. 



Orthis? apicalis (Billings). 



Orthis? apicalis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 301, fig. 



291.— Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 217— Schuchert, 



Bull. U. S. Geol. Surv., 87, 1897, p. 283. 

 Ozarkian?: Point Levis (Levis-erratics) and Island of Orleans, Quebec. 



Orthis (Dalmanella) arcuaria Hall and Clarke. See Dalmanella arcuaria. 



