808 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Michelinia louisvillensis Greene. 



Michelinia louisvillensis Greene, Cont. Indiana Pal., pt. 3, 1899, p. 20, pi. 8, figs. 



10-12. 

 Niagaran (Louisville): Near Louisville, Kentucky. 



Michelinia niagarensis Davis. 



Michelinia niagarensis Davis, Kentucky Foss. Corals, Geol. Surv. Kentucky, 



pt. 2, 1885, pi. 39, fig. 2. 

 Niagaran (Louisville): Near Louisville, Kentucky. 



Michelinia prima Davis. 



Michelinia prima Davis, Kentucky Foss. Corals, Geol. Surv. Kentucky, pt. 2, 



1885, pi. 39, figs. 3-5; pi. 40, fig. 1. 

 Niagaran (Louisville): Louisville, Kentucky. 



MICROCERAS Hall. Genotype: M. inornaturn Hall 



Microceras Hall, Amer. Jour. Sci., 48, 1845, p. 249. — Meek, Geol. Surv. Ohio 

 Pal. 1, 1873, p. 148.— Miller, Cincinnati Quart, Jour. Sci., 1, 1874, p 

 311.— Koninck, Ann. Mus. Royal d'Hist. Nat. de Belgique, 8, 1883, p. 123 

 footnote.— Miller, N. A. Geol. Pal., 1889, p. 410.— Ulrich and Scofield, Geol 

 Minnesota, 3, pt. 2, 1897, p. 847.— Cumings, 32d Ann. Rep. Dep. Geol. Nat 

 Res., Indiana, 1908, p. 951. 

 Discolites Emmons, Amer. Geology, 1, pt. 2, 1855, p. 234 (Genotype: D. minutus 

 Emmons). 



Microceras inornatnm Hall. 



Microceras inornatus Hall, Amer. Jour. Sci. Arts, 48, 1845, p. 294. — Miller, Cin- 

 cinnati Quart. Jour. Sci., 1, 1874, p. 312.— Cumings, 32d Ann. Rep. Dep. 

 Geol. Nat. Res. Indiana, 1908, p. 970, pi. 40, figs. 9, 9a. 



Cyrtolites (Microceras) inornatus Meek, Geol. Surv. Ohio, Pal. 1, 1873, p. 147, 

 pi. 13, figs. 4a, b. 



Cyrtolites subcompressus Meek, Geol. Surv. Ohio, Pal. 1, 1873, p. 147 (under 

 C. inornatus). 



Discolites minutus Emmons, Amer. Geology, 1, pt. 2, 1855, p. 234. 



Maysville and Richmond: Cincinnati, Ohio, and vicinity; Indiana; Kentucky; 

 Tennessee; etc. 



Microceras miimtissiinum Ulrich. 



Microceras minutissimum Ulrich, Jour. Cin. Soc. Nat. Hist., 2, 1879, p. 13, pi. 7, 



fig. 8. 

 Maysville (Fairmount): Hamilton, and Cincinnati, Ohio. 

 Cotypes.— Cat. No. 46048, U.S.N.M.. 



Microdiscus Emmons. See Ampyx Dalman. 



Micropora Eichwald. See Stictoporella Ulrich. 



Microspongia Miller and Dyer. See Hindia Duncan. 



Millepora repens Fought. See Alveolites repens. 



Milleria Davis. See Dictyostroma Nicholson. 



MIMULUS Barrande. Genotype: M. perversus Barrande. 



Stimulus Barrande, Syst. Sil. du Centre Boheme, 5, pt. 1, 1879, p. 109, pi. 9 

 (Ext. ibid., p. 173).— Zittel, Handb. Pal., 1, p. 684.— Hall and Clarke, Pal. 

 New York, 8, pt. 1, 1892, p. 272; 11th Ann. Rep. New York State Geol., 

 1894, p. 289— Schuchert, Zittel-Eastman Textb. Pal., 1, 1900, p. 315; ibid., 

 2d ed., 1913, p. 388. 



