904 FLORAL ZONES OF THE POTTSVILLE FORMATION. 



t3'pes. From an oxauiiiiation of examples from St. John, I am 



disposed to regard the latter as possibly young leav'^s of Cordaites 



Hol'hii. to Avhieh they are undoubted!}' at least very closely related. 



In the anthracite Held, as at St. John, both species occur in the same 



beds. 



Cordaites grandifolius Lx. 



The most conspicuous features of this interesting- species are the 

 great breadth and broadly cuneate form of its large leaves. The base 

 is narrow, the lateral margins always more or less strongly concave, 

 and the distal margin, or top, rounded or round-truncate, and cut, in the 

 older examples, into short, broad, unequal, round-truncate lobes. In 

 fact, the general form, texture, nervation, and the mode of lobation 

 at the apex are suggestive of the Ginkgoales. This species appears 

 to be present in the material from the west side of Kohlers Gap in 

 Bear Mountain, and from the rock dump from one of the upper 

 Lykens coals at the New Lincoln mine. The originals described by 

 Lesquereux^ are from Campbell Ledge, near Pittston, Pennsylvania. 



Whittleseya elegans Newb. var. minor n. var. 



The interesting tj'pe of vegetation described by Dr. Newberry^ from 

 the roof of the Sharon coal at Tallmadge, Ohio, as Whittleseya elegans^ 

 has been discovered at a number of other points in the Sewanee zone, 

 throughout the Appalachian province. At various localities and hori- 

 zons a number of additional species or varieties have also come to light. 

 The leaves of the variety minor are much smaller than those of the 

 normal form, and are proportionately broader, they being usualh' a 

 little broader than long. The nerve fascicles are also a little more 

 crowded, numbering about fifteen to the centimeter at the top. The 

 form, texture, and nervation of this species, which can hardh^ be else 

 than a gvmnos])erm. are such as to app(nir to justify its reference to the 

 Ginkgoales. The variety was o])tained from the parting between 

 Lykens coals Nos. 2 and 3 at the Lincoln mine. 



Whittleseya micrgphylla Lx. 



Tiic salient features of this species, described by Lesquereux,^ are 

 the small size, the distinctly cuneat(^ foi-m. and the fasciculately fibrous 

 texture of the leaves, which range iwnw 5 to 15 mm. in length and 

 average about <; mm. in width. The fasciculate nerve ])undles, which, 

 as in 11' rlegxii-s^ are in i)art derived from the thickened lateral margin 

 in the base of the leaf, constitute rather poorly detiiicd longitudinal 

 ribs, each of which enters a usuall\- ol)scure, rounded tootii in the 



1 Proc. Am. Philos. Soc, Vol. XVII, 1878, p. 318, pi. xlviil, figs. 1, 2, 2a. Coal Flora, Atlas, p. 16, pi. 

 Ixxvii, figs. 1, 2, 2a; text, Vol. I, p. .530. 



SAnnals Sci., Cleveland, Vol. I, lAi8, p. iifi, fig.«. i, 2a-b. Lesqucreux, Coal Flora, Atlas, p. J, pl.iv, 

 figs, 1,1a. Renault, Cours. hot. fo.ss., Vol. IV, p. C9, pi. v, figs. 9 and 10. 



8 Coal Flora, Vol. Ill, p.S43. 



