FERNS— TRIPHYLLOPTElilDE^—PSEUDOPECOPTEEIS. 27 



Localities. — Pitcher's coal bank, U. S. Nat. Mus., 5440, 5441, 5624, 

 5625, 5627, 5628, 5629, 5635, 5716, 5717, 5718; Henry County, U. S. Nat. 

 Mus., 5438. Hobbs's coal bank, U. S. Nat. Mus., 5439. 



PSEtJDOPECOPTERIS SQUAMOSA Lx. Sp. 



PI. IX, Fig. 4. 



1854. Sphenopteris squamosa Lesquereux, Bost. Journ. N. H., vol. vi, No. 4, p. 420. 

 1858. Sphenopteris squamosa Lesquereux, Geol. Penusylvania, vol. ii, p. 862, pi. x, 



fig. 3. 

 1876. Pecopteris neuropteroides Boulay (nou Kutorga), Terr, houill. n. d. Fr., p. 32, 



pi. ii, figs. 6, 66. 

 1879. Pseudopecopteris anceps Lesquereux, Coal Flora, Atlas, p. 7, pi. xxxviii, figs. 1-4; 



text, vol. i (1880), p. 207 (cum syn.). 

 1889. Pseudopecopteris anceps Lx., Lesley, Diet. Foss. Pennsylvania, vol. ii, p. 796, 



text- figs. 

 1883. Sphenopteris nevropteroides (Boul.) Zeiller, Ann. Sci. Nat., (6) bot., vol. xvi, 



p. 186. 



1886. Bphenopteris nevropteroides (Boul.) Zeiller, Fl. foss. houill. Valenciennes, Atlas, 



pi. ii, figs. 1, Iff, 2, 2a; text (1888), p. 349. 



1887. Sphenopteris 7ieuropteroides (Bonl.) Zeill., Kidston, Foss. Fl. Eadstock Ser., p. 349. 

 1897. Pseudopecopteris squamosa (Lx.) D. White, Bull. Geol. Soc. Ainer., vol. viii, 



p. 291. 

 1899. Pseudopecopteris squamosa (Lx.) D. White, 19th Aqu. Eept. U. S. Geol. Surv., 3, 

 p. 474. 



"Frond compound, multifid, dichotomous or quadripinnate ; primary 

 racliis broad; pinnge of the third order, oblique, distant, rigid or flexuous; 

 ultimate pinnse short, inclined upward, lanceolate or oblong, obtuse, pin- 

 nately lobed; pinnules short, round, ovate or subquadrate, connate at the 

 base, the lower generally free, the upper joined to the middle; upper ^jinn^ 

 simple, undulate by the gradual cohesion of the lobes; veins forking twice, 

 curving to the borders, all derived from a thin midrib of the same size as 

 the veins." 



Although this species, familiar to paleontologists as Pseudopeco2)teris 

 anceps, is not rare in the Coal Measures of Pennsylvania, where it is obtained 

 from many localities, it is only recently that it has been collected west of 

 the Mississippi River. Even now it is, so far as I know, represented only 

 by the specimen illustrated, PI. IX, Fig. 4, which was loaned to the United 

 States Geological Survey by Dr. Britts. Owing, therefore, to the paucity of 



