66 FLORA OF LOWER COAL MEASURES OF MISSOURI. 



closely related to the Europeau Pecopteris crenulata, with which some of the 

 matei-ial from Mazon Creek, Illinois, is either identical or at least so similar 

 as to seem to justify Professor Zeiller's remarli as to the interest in the 

 occurrence of this type both in IlHnois and in probably contemporaneous 

 beds in the upper part of the Valenciennes series, or at Geislautern. 



Locality. — Pitcher's coal bank, Henry Coimty, Missouri. Loaned by 

 Dr. J. H. Britts, Clinton, Missouri. 



Sphbnuptbris sp. 



PL XXXV, Fig. 6. 



The fragment represented in PI. XXXV, Fig. 6, is the only example 

 of this peculiar form in the collection. The shape of the decurrent half- 

 stalked pinnules with sinuate or sinuate-dentate margins is different, I 

 believe, from any yet described. ]Most of the characters found in the speci- 

 men are seen in the photograph or the detail, Fig. Qa. The rachis is very 

 finely lineate and is bordered in the lateral pinuEe by a narrow decurring 

 wing. The substance of the pinnule is not very thick, and is dull, tliough 

 smooth, and flat, or nearly flat. The nervation is fairly clear, the midrib rather 

 strong at the base, tapering in passing upward and vanishing at the apex. 



It is hoped that the accompanying figures and notes will facilitate the 

 recognition and identification of the species, which appears to have been 

 one of considerable grace and beauty. 



Locality. — Henry County, Missouri; U. S. Nat. Mus., 5654. 

 Sphenopteris bilobata Ls. ined. 



The type of this species is described among the unpublished manuscript 

 of Professor Lesquereux. Pending its publication with other similar 

 material in due form, further consideration in this memoir is waived. 



Locality. — Vicinity of Clinton, Henry County; Nos. 5703, 5704, Lacoe 

 collection, U. S. Nat. Mus. 



OLIGOCARPIA Goeppert, 1841. 



GattuDgeu, Lief. 1 u. 2, p. 3. 



Oligocaepia missoubiensis n. sp. 



PI. XX, Figs. 1, 2; PL XXI, Figs. 1?, 2?, 3, 4. 



1897. Olujocarina sp., D. White, BulL GeoL Soc. Amer., voL viii, pp. 296, 300. 



Fronds tri- or polypinnate, lax, spreading, rather delicate; rachis very 

 slender, narrow, sulcate above, terete below in the subordinate divisions, 



