FEENS— SPHENOrTERIDB.E— SPHENOPTEIJIS. ' 51 



1S79. SphenopteHs crLstata (Brougn.) Presl, Schimper, iu Zittel: Hand. Pahtoiit., vol. 



ii, p. 109, flo-. 80. 

 1880. Sphenopteris cristata (Broiign.) Presl, Lesquereux, Goal Flora, vol. i, p. 274; vol. 



iii (1884), p. 7G1, pi. cii, flgs. 1, la (fig. Irt. copied from Brongniart). 

 1890. Splienoptens cristata (Brougu.) Presl, Zeiller, Fl. foss. liouill. Oommentry, vol. i, 



p. 64, pi. iii, figs. 1, la, 2, 2a-h. 

 1893. Ovopteris cristata (Broiigu.) Potonie, FL Kotlil. Thiiringeu, p. 44. 



The remarks made under S. chcerophyUoides Brougu., referring to the 

 differentiation of the specimens in the United States that have been assigned 

 to that species, apply with equal force to S. cristata Brongii. In the collections 

 now in hand are a number of sj^ecimens with naiTOW terete and nonpunctate 

 rachises and a rather thin, smooth limb, on which the veins are clearly seen, 

 the nervation and mode of division of the pinnules being very close to 

 S])henoj)teris cristata as illustrated by Brongniart ^ and Zeiller.^ The Missouri 

 specimens also agree well with others from Mazon Creek, Illinois, placed by 

 Lesquereux in the same species. 



The relations of the American sj^ecimens in S. cristata to those identi- 

 fied as S. chcBrojL)hjlloides can best be shown in a monographic revision of this 

 section of the Sphenopterids. 



Localities. — Hobbs's coal bank, II. S. Nat. Mus., 5504 ; Owens's coal 

 bank, U. S. Nat. Mus., 5603, 5507 ; Pitcher's coal bank, U. S. Nat. Mus., 

 6605. 



Sphenopteris suspecta u. sp. 



PI. XXXV, Figs. 1-3. 



Frond tri- or polypinnate, rather compact; secondary (?) pinnje lanceo- 

 late, contracted somewhat at the base, acute, slighth' flexuous and lax; 

 raclais slender, slightly flexuous in accordance with the bases of the lateral 

 pinnas, shallowly canaliculate above, terete below, minutely lineate, and 

 very distantly punctate; ultimate pinnae alternate, open, somewhat reflexed 

 at the base, becoming oblique toward the top, rather close, a little distant 

 or touching, often gently curved, oblong, lanceolate or linear-lanceolate, 

 acute, slightly narrowed at the base; pinnules large, close, usual!}- touching 

 or slightly overlapping, oblique, ovate or ovate-oblong, slightly curved 



' Hist. v6g. foss., p. 356, pi. cxsv, fig. 45. The figure of the enlarged jiinnule is copied in Les- 

 quereux's Coal Flora, vol. iii, pi. cii, fig. la. 



2 Fl. foss. houill. Valenciennes, Atlas, pi. s, figs. 1, la, 2, '2a-b. 



