70 FLORA OF LOWER COAL MEASURES OF MISSOURL 



more distant and flabellate nerves. The examination of a number of speci- 

 mens from the same locahty as the one figured throws considerable doubt 

 on the identity of the European and American plants. 



The Missouri specimen is quite different from the form referred by Les- 

 quereux to 0. alabamensis Lx., or that described in this report as 0. missouri- 

 ensis, being distinguished from both by the form of its pinnse, the broader 

 confluent pinnules, and the more flabellate nervation. It resembles in some 

 respects some of the more slender pinnae of Pseudopecopteris Pluckenetii 

 (Schloth) Lx. 



Locality. — Hobbs's coal bank, U. S. Nat. Mus., 5570. 



ALOIOPTERIS Potonie, 1894. 



Jahrb. d. k. Pr. geol. Laudesaust. n. Bergakad., voL xiv, 189^3, Mittheil., p. xlviii. 

 Abh. d. k. Pr. geoL Landesanst, u. F., No. 21, 1896, p. 24. 



Aloiopteris eeosa (Gutb.). 

 PL XXIII, Fig. 0; PI. XXIV, Fig. 3«. 



1843. Pecopteris erosa Gutbier, in jSTaumann, Cotta, Geinitz, etaL: Gaa v. Sachsen, 



Flora, p. 81. 

 1879. Pecopteris erosa Gutb., Lesqiiereux, Coal Flora, Atlas, p. 8, pi. sliv, figs. 1, Irt, 3: 



text, vol. i (1880), p. 255. 

 1843. Pecopteris (Cyatheites) linearis Gutbier (nee Rost, nee Stb., necque Old. et 



Morr.), in Naumann, Cotta, Geinitz, et al.: Giia v. Sachseu, Flora, p. 83. 

 1855. Aletliopteris erosa (Gutb.) Geiuitz, Verst. Steink. Sacbseii, p. 29, pi. xxxii, figs. 



7-9, la, 9a. 

 1869. Aletliopteris erosa (Gutb.) Gein., von Roehl, Foss. Fl. Steink. Westphaleus, ^. 81 



(pi. xxi, flg. 11 ■?) 

 1877. Prepecopteris erosa (Gutb.) Graud'Eury, Fl. Garb. Loire, p. 63. 



1884. GranWEurya erosa (Gutb.) Zeiller, Ann. Sci. Nat., (6) bot., vol. xvii, p. 9. 



1885. Saccopteris erosa (Gutb.) Stur, Fame d. Carbon- Fl., p. 159. 



1887. Gorynepteris erosa (Gutb.) Kidston, Foss. Fl. Radstock Ser., p. 381. 



1888. Gorynepteris erosa (Gutb.) Kidst., Zeiller, Fl. foss. houill. Valenciennes, ^. 43. 



The illustration of a fragment of a long compound pimia of this species 

 published in the Coal Flora^ gives a good general idea of the long, slender, 

 close, extremely open pinnse characteristic of this species. It also shows 

 the more delicate habit of the American plant, the outlines of wliich differ 

 somewhat from the European type, which is still inscribed by some authors 

 in the genus Aletliopteris. 



' Atlas, pi. xliv, figs. 1, la. 



