184 KANSAS UNIVERSITY QUARTERLY. 



ually reduced. The specimen photographed (plate XL) also 

 shows the pinnule approaching the apex, becoming shorter and 

 proportionally broader. 



On the rachis of one specimen of this species there occurs a 

 narrowly elongate scar, 3 mm. long and less than a half mm. 

 wide. A similar but smaller scar occurs on the rachis of a 

 fragment probably referable to this species. These scars are of 

 interest, because of their seeming identity with numerous such 

 scars occurring on or near the rachis of some of the Tirniopterids 

 of the collection, which in turn at least resemble the scars on 

 Macrotfrnicrpteris , described as probable fructification by Fon- 

 taine.* 



These scars will be more fully described in treating of the 

 Tseniopteruh of the formation. 



Glenopteris simplex, sp. nov. Plate XXXVII, fig. 2: plate XXXVIII, figs. 2 

 and 3; plate XXXIX; plate XL. Type No. 5101. 



Fronds small, 10 to 15 or more cm. long, simply pinnatifid, 

 narrowly elliptical in outline, short petiolate, broadest in the 

 middle, tapering to base and apex. Fronds apparently thick, 

 leaving a thick carbonaceous layer on the rock ; very variable 

 in size ; always curved from the base, often decidedly so, in- 

 equilateral in development, due to the excessive growth of the 

 pinnules on the convex side of the frond. Pinnules alternate, 

 decurrent at the base, joining the pinnule below by a winged 

 projection, or by a more or less distinct auricle, rounded above 

 the base, in general, oblique to the rachis; in the young frond 

 the pinnules are close, oblique, ovate, or oblong; as the frond 

 develops the pinnules become more distant, oblong, still leav- 

 ing the rachis obliquely, but curved back at the apex ; in the 

 largest fronds the pinnules are 1 cm. distant, 3 to 4 cm. long, 

 curving back decidedly at the apex, giving the frond a lax ap- 

 pearance. Pinnules at the middle of the frond largest, most 

 distinctly curved. Apex very obtusely rounded. Borders en- 

 tire, straight, or irregularly undulate. Pinnules at the base of 

 the frond much reduced; lower ones, which are 1 or 2 cm. 

 from the base, mere wing-like projections, 3 or 4 mm. long. 

 Pinnules also reduced towards the apex, becoming ovate, 

 odontopteroid in appearance, passing into undulations of a 

 lanceolate, obtuse, terminal pinnule. The terminal pinnule is 



* Monograph, Older Mesozoic Flora of Virginia, p. 18. 



