110 FLORA OF LOWER COAL MEASURES OF MISSOURL 



Aphlebia subgoldenbergii n. sp. 

 PI. XLVII, Fig. 7. 



1897. Aphlebia sp., D. White, Ball. Geol. Soc. Aiuer., vol. viii, p. 297. 



Frond pinnate, lanceolate (?) or linear-lanceolate (?), membranaceous, 

 racliis broad, rigid, densely but unevenly and finely striate, and bordered 

 by a decurrent lamina; lateral divisions oblique, alternate or suboppositt, 

 lanceolate or linear-lanceolate, acute (1) at the apex, somewhat constricted 

 at the strongly decurrent base, pinnatifid; lobules or ultimate diviisions A^ery 

 oblique, alternate, lanceolate, obtuse, more or less distinctly outward 

 curved, connate for some distance above the decurrent base, each lobule 

 traversed by a strong, clear, flat nervil; lamina membranaceous, trans- 

 parent, uniting the lobules in the lower portions and decurring with narrow, 

 very acute sinuses to form a narrow border along the main (?) rachis; 

 nervils alternate, a single one passing strong to the apex of each lobe, more 

 or less distinctly dilated in the middle portion, sometimes in the upper part 

 also, and curving in and decurring near the base so as to join the lateral 

 rachises at a very broad angle ; lateral rachises strong and flat, broadest in 

 the curve at the base of the pinna, and narrowing in the long descent before 

 joining the main rachis. 



The specimen. No. 9599 of the Lacoe collection, on which I have 

 ventured to found this species came from the vicinity of Clinton, Henry 

 County, Missouri, and was identified by Professor Lesquereux as Bhaco- 

 phyllum memhranaceum Lx. A comparison made with the types of that 

 species^ shows, however, not very much in common except the delicately 

 membranaceous lamina. It differs from the latter species by the well- 

 defined axis in both the main and lateral divisions; the arrangement of the 

 pinnse, constricted at the base; the regularly alternate lobules, which curve 

 outward, and are more deeply dissected and obtuse, and the broad, much 

 stronger, flat nervation, which is simpler and not flabellate. 



The salient features of our specimen, Fig. 7, PL XLVII, are the 

 general form of the frond and arrangement of the pinnae, very similar to 

 those illustrated by Schimper - from the type of Bhacophyllum Goldenbergii 



1 Coal Flora, vol. i, i). 312, pi. Ivili, figs. 1, 2. -TraiW, pi. slvi, fig. 2, vol. i, p. i 



