BIBLIOGEAPHIC LIST OF GENERA AND SPECIES. 885 



Orinathichnus moniliformis Miller. 



Onnathichnus moniliformis Miller, Jour. Cincinnati Soc. Nat. Hist., 2, 1884, p. 



222, pi. 14, figs. 4, 5. 

 Eden (Economy): "Walker Mill Road, Cincinnati, Ohio. 



Ormoceras Stokes. See Actinoceras Bronn. 



Ormoceras anceps Chapman. See Gonioceras anceps. 



Ormoceras Brongniarti Owen. See Actinoceras richardsoni. 



Ormoceras Lyoni Hector. See Actinoceras bigsbyi. 



Ormoceras moniliforme Hall. See Loxoceras moniliforme. 



ORMOCRINUS Springer. Genotype: Centrocrinus tennesseensis Worthen. 



Ormocrinus Springer, Mon. Crin. Flex., Smith. Inst, (in press). 



Ormocrinxis tennesseensis (Worthen). 



Centrocrinus tennesseensis Worthen, Geol. Surv. Illinois, 8, 1890, p. 95, pi. 14, 



fig. 1- 

 Idiocrinus? tennesseensis Wachsmuth and Springer, Mem. Mus. Comp. Zool., 



Harvard, 20, 1897, p. 206, pi. 18, fig. 11. 

 Ormocrinus tennesseensis Springer, Mon. Crin. Flex., Smith. Inst, (in press). 

 Niagaran (Brownsport): Near Clifton, Wayne County, Tennessee. 



Ormospira Grabau and Shinier. See Omospira Ulrich. 



ORTHIDIUM Hall and Clarke. Genotype: Orthis gemmicula Billings. 



Orthidium Hall and Clarke, Pal. New York, 8, pt. 1, 1892, p. 244; 11th Ann. 

 Rep. New York State Geol., 1894, p. 276— Miller, N. A. Geol. Pal., 2d App., 

 1897, p. 762. 



Orthidium gemmicula (Billings). 



Orthis gemmicula Billings, Pal. Fossils, 1, Geol. Surv. Canada, 1865, p. 75, fig. 



68 (adv. sheets 1862). 

 Orthidium gemmicula Hall and Clarke, Pal. New York, 8, pt. 1, 1892, pp. 217, 



244, pi. 7A, figs. 22-25. 

 Ozarkian ? (Levis — erratic): Point Levis, Quebec. 



Orthidium lamellosum Raymond. 



Orthidium lamellosa Raymond, Amer. Jour. Sci., 4th ser., 20, 1905, p. 371; Ann. 



Carnegie Mus., 7, 1911, p. 248, pi. 36, figs. 17, 18; fig. 24. 

 Chazyan (Crown Point, Valcour): Valcour and Sloop Islands, Chazy and Crown 

 Point, New York. 



ORTHIS Dalman (emend. Hall and Clarke). Genotype: O. calligramma Dalman 

 Orthis Dalman, Kongl. Svenska Vet. Akad. Handl., 1828, pp. 93, 90.— nail and 

 Clarke, Pal. New York, 8, pt. 1, 1892, p. 192.— Winchell and Schuchert, 

 Geol. Minnesota, 3, 1893, p. 417. — Hall and Clarke, 11th Ann. Rep. State 

 Geol. Surv., 1894, p. 265.— Wysogorski, Zeit. d. d. geol. Gesell., 52, 1900, p. 

 225.— Grabau, Bull. New York State Mus., 9, 1901, p. 185; Bull. Buffalo Soc. 

 Nat. Sci., 7, 1901, p. 185.— Grabau and Shinier, N. A. Index Fossils, 1, 1907, 

 p. 250.— Schuchert, Zittel-Eastman Textb. Pal., 1900, p. 319; 2d ed., 1913, 

 p. 381. 



Orthis of authors. 



Orthis Emmons, Amer. Geol., 1, pt. 2, 1855, p. 193. — Billings, Canadian Nat. 

 Geol., 1, 1856, p. 133.— Pictet,TraitedePal.,2d ed., 4, 1857, p. 55.— Chapman, 

 Canadian Jour., n. s., 3, 1858, p. 160; ibid., 7, 1862, p. 111.— Hitchcock, Geol. 



