T.^5NI0PHYLLE.E— T.gSNlOPHTLLUM. 247 



as will be observed in the figure, is marked by irregularly flexuose, subpar- 

 allel, distantly anastomosing, narrow, sliarp, rugose ridges. The fragments 

 appear to belong to some root or rhizome. The suggestiveness of the sculp- 

 ture of the cortical striation of SigiUaria camptotcenia, which is found at this 

 locality,. leads me to suspect that it maybe apart of that tree, although the 

 specimens have no trace of a rhomboidal arrangement or of cicatrices. 

 Locality. — Pitcher's coal mine, U. S. Nat. Mus., 6067. 



INCERT.^^ SEDIS. 



TJENIOPHYLLE^gE. 



TJ^NIOPHYLLUM Lesquereux, 1878. 



1878. Twniophyllum Lesquereus, Proc. Am. Phil. Soc, vol. xvii, p. 331 ; Coal Flora, 



vol. ii, 1880, p. 461. 

 1878. Besmiophyllum Lesquereux, Proc. Am. Phil. Soc, vol. xvii, p. 332; Coal Flora, 



vol. ii, 1880, p. 556. 



TWNIOPHYLLUM LATIFOLIUM U. Sp. 



PL LXIir, Fig. 4; PL LXXI. 



Axis attaining a diameter of 10 cm. or more, simple (!), straight, or 

 flexuose, concealed in compressed specimens by a thick mat of the decurrent 

 leaf bases, and marked in the decorticated impressions by numerous oval or 

 linear-oval umbilicoid small scars among lax, variable, subparallel vascular 

 strise ; leaves (!) crowded at the strongly decurrent narrowed bases, curAang 

 outward and radiating parallel, linear, straight, or lax, appearing in com- 

 pound specimens as ribbonhke, fine-nerved, dehcate impressions, 8 to 35 

 cm. or more in length, 3 to 20 mm. in width, the sides parallel except near 

 the base, with a very thin carbonaceous residue marked here and there at 

 distant points by very snlall oval umbilical scars, and covering a longitu- 

 dinal fascicle of strands 1 to 3 mm. wide, and either straight or windino- 

 irregularly with slight curves within the borders; uncompressed leaves 

 probably oval or cylindi'ical, lax, and consisting of a central (F) fascicle or a 

 vascular axis, between which and the outer sheath the tissue is either 

 lacuneous or very delicate and perishable, so that the central fascicle is 

 usually relaxed as if in a cavity during fossilization ; the small oval umbili- 

 coid scars occurring generally remotely on the leaves correspond to the 

 irregular points of origin of other smaller leaves (!) extending out, generally 



