822 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Modiomorpha acuminata Parks. 



Modiomorpha acuminata Parks in Tyrrell, 22d Rep. Ontario Bur. Mines, 1913, 



p. 36. 

 Niagaran (Guelph): Severn River, Ontario. 



MODIOMORPHA ALTA Lesley. See Modiolopsis primigenia. 



Monilipora macrostoma Roemer. Not recognized. 



Monilipora macrostoma Roemer Leth. geog., pt. 1, Leth. Pal., 1883, p. 526. 

 " Kohlenkalke " : Louisville, Kentucky. 



MONOBOLINA REFULGENS Matthews. See Obolus(?) refulgens. 



MONOCRATERION Torell. 



Monocraterion Torell, Lunds Univers. Arsskrift, 6, 1869, p. 13. Miller, N. A. 

 Geol. Pal., 1889, p. 519. Matthew, Trans. Royal Soc. Canada, 8, sec. 4, 1891, 

 p. 160; The Irish Naturalist, 1901, p. 135. 



Monocraterion lesleyi Prime. 



Monocraterion lesleyi Prime, Geol. Surv. Pennsylvania, Rep. PP, 1878, p. 79, 



pi. 5, fig. 1. Lesley, ibid., Rep. P 4, 1889, p. 417, figs. 

 Calciferous?: Northampton, Lehigh, and Bucks Counties, Pennsylvania. 



Monograpsus Emmons. Genotype: M. elegans Emmons. 



Monograpsus Emmons, Amer. Geol., 1, pt. 2, 1855, p. 106. 

 Monograptus Miller, N. A. Geol. Pal., 1889, p. 196. 



Observation. Not recognized. The types are lost and the species can not be 

 identified. 



Monograpsus elegans Emmons. Not recognized. 



Monograpsus elegans Emmons, Amer. Geol., 1, pt. 2, 1855, p. 106, pi. 1, fig. 27. 

 Monograptus elegans Elles'and Wood, Mon. British Grapt. Pal. Soc., 1903, p. 38. 

 Didymograptus? elegans Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, 



pp. 255, 256. 

 "Taconic" (Middle Ordovician) : Augusta County, Virginia. 



Monograpsus rectus Emmons. Not recognized. 



Monograpsus rectus Emmons, Amer. Geol., 1, pt. 2, 1856, p. 107, fig. 28, pi. 1. 

 Didymograptus rectus Ruedemann, Mem. New York State Mus., 11, pt. 2, 1908, 



p. 256. 

 "Taconic shales": Columbia County, New York. 



MONOGRAPTUS Geinitz. Genotype: Graptolithus priodon Bronn. 



Monograpsus Geinitz, Bull. Soc. Geol. France, 2d ser., 9, 1852, p. 187; Zeits. d. d. 

 geol. Gesell., 3, 1852, p. 389; Amer. Jour. Sci. Arts, 2d ser., 14, 1852, p. 129. 



Monograptus Hall, 20th Rep. New York State Cab. Hist., 1868, p. 217. Lap- 

 worth, Geol. Mag., 2d ser., 3, 1876, p. 314. Zittel, Handb. Pal., 1, 1879, p. 

 297. Jaekel, Zeits. d. d. geol. Gesell., 41, 1889, p. 660. Perner, Etudes sur 

 les Grapt. de Boheme, pt. 1, Prague, 1894, p. 4. Wiman, Bull. Geol. Inst. 

 Univ. Upsala, 2, pt. 2, 1896, p. 267. Gurich, Verh. d. Russ.-Kais. Mineral 

 Gesell. zu St. Petersburg, 2d ser., 32, 1896, p. 109. Koken, Die Leitfossilien, 

 Leipzig, 1896, p. 329, fig. 238. Gurich, Zeits. d. d. geol. Gesell., 48, 1896, p. 

 954. Walther, ibid., 49, 1897, p. 251. Roemer and Freeh, Leth. geog., 1, 

 Theil, Leth. Pal., 1, 3 Lief., 1897, p. 638. Ruedemann, Amer. Nat., 32, 1898, 

 p. 3; Zittel-Eastman Textb. Pal., 1, 1900, p. 117. Grabau and Shimer, 

 N. A. Index Fossils, 1, 1906, p. 34. Ruedemann, Mem. New York State Mus., 

 11, pt. 2, 1908, p. 449; Zittel-Eastman Textb. Pal., 2d ed., 1913, p. 132. 



