884 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Orbignyella billingsi (Foord). 



Monticulipora Billingsi Foord, Oontr. Micro-Pal. Cambro-Sil., 1883, p. 8, pi. 1, 



figs. 2-2c. 

 Orbignyella? billingsi Ulrich and Bassler, Smiths. Misc. Coll., 47, 1904, p. 19 



(gen. ref.). 

 Trenton: Ottawa, Ontario. 



Orbignyella expansa (Ringueberg). 



Chsetetes expansus Ringueberg, Bull. Buffalo Soc. Nat. Hist., 5, 1886, p. 20-, 



pi. 2, fig. 17. 

 Orbignyella? expansus Ulrich and Bassler, Smiths. Misc. Coll., 47, 1904, p. 19 



(gen. ref.).— Bassler, Bull. U. S. Geol. Surv. 292, 1906, p. 26, pi. 10, figs. 



5-8. 

 Clinton (Rochester): Lockport, Niagara Gorge, and Rochester, New York; 



Grimsby, Ontario. 

 Plesiotypes — Cat. No. 35541, U.S.N .M. 



Orbignyella larnellosa (Ulrich). 



Monticulipora lamellosa Ulrich, Geol. Surv. Illinois, 8, 1890, p. 408, pi. 32, figs. 



4-4b. — J. F. James, Jour. Cincinnati Soc. Nat. Hist., 18, 1895, p. 83. 

 Orbignyella lamellosa Ulrich and Bassler, Smiths. Misc. Coll., Quart.. 47, 1904, p. 



20, pi. 6, fig. 10. 

 Richmond (Fernvale): Wilmington, Illinois. 

 Fragment of hoiotype — Cat. No. 43303, U.S.N .M. 



Orbignyella inagnopora Bassler. 



Orbignyella magnopora Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 27, pi. 10, 



figs. 9-12. 

 Clinton (Rochester): Grimsby, Ontario; Lockport and Rochester, New York. 

 Hoiotype.— Cat. No. 35537, U.S.N .M. 



Orbignyella sublamellosa Ulrich and Bassler. 



Orbignyella sublamellosa Ulrich and Bassler, Smiths. Misc. Coll., Quart., 47, 

 1904, p. 19, pi. 6, figs. 7-9. 

 • Stones River (Pierce): Murfreesboro, Tennessee. 

 Hoiotype.— -Cat. No. 43174, U.S.N .M. 



Orbignyella wetherbyi (Ulrich). 



Monticulipora wetherbyi Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 

 239, pi. 10, figs. 4-4b; 14th Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 

 1886, p. 129. — James and James, Jour. Cincinnati Soc. Nat. Hist., 11, 1888, p. 

 24.— Ulrich, Contr. Micro-Pal. Cambro-Sil., pt. 2, 1889, p. 30; Geol. Minne- 

 sota, 3, 1893, p. 218, pi. 15, figs. 7, 8.— Whiteaves, Pal. Foss., 3, 1897, p. 162. 



Orbignyella wetherbyi Ulrich and Bassler, Smiths. Misc. Coll., 47, 1904, p. 19 (gen. 

 ref.). 



Black River: High Bridge, Kentucky (Lowville); Minneapolis, Minnesota 

 (Platteville) ; St. Andrews, Manitoba. 



Cotypes.— Cat. No. 43690, U.S.N .M. 



Orbitulites reticulata Owen. See Ischadites iowensis. 



Oriostoma (part) Lindstrom. See Poleumita Clarke and Ruedemann. 



ORMATHICHNUS Miller. Genotype: O. moniliformis Miller. 



Ormathichnus Miller, Jour. Cincinnati Soc. Nat. Hist., 2, 1880, p. 222. — James, 

 ibid., 8, 1885, pp. 160, 161.— Miller, N. A. Geol. Pal., 1889, p. 414. 



