186 KANSAS UNIVERSITY QUARTERLY. 



decurring wing to the pinnule below, situated very obliquely on 

 the rachis, linear-lanceolate, straight, very symmetrical above 

 the base, narrowing gradually and regularly from the base to the 

 apex; borders straight and entire, apex rounded, or cut off 

 wedge shaped. Pinnules reduced in passing to the apex, be- 

 coming shorter, proportionally wider, at last not more than 5 

 or 6 mm. long, 4 or 5 mm. wide, and triangular in shape. 

 Midvein of the reduced pinnule still evident, continuing to the 

 apex. Pinnules also reduced towards the base of the frond as 

 in other species of the genus, lower pair reflexed. Midvein 

 straight, deep, and narrow, deeply emersed, continuing quite 

 to the apex of the pinnule, percurrent at the base ; lateral veins 

 obliterated in all the specimens yet obtained by the thick, longi- 

 tudinally wrinkled substance of the frond. 



The species is described from four specimens, two of them 

 representing the apical part of the frond, but with the extreme 

 apex of both broken ; one from the base, and one from near or be- 

 low the middle, a part of which is shown in fig. 5, plate XXXVIII. 

 The upward curve of the long pinnule of this plate is due largely 

 or entirely to a break below the center of the pinnule and the 

 dislocation of the apex. Other pinnules above and below this 

 one do not show the scythe shape. 



Glenopteris sterling!, ep. nov. Plate XLI ; plate XLII, fig. 1. Type No. 5104. 



Fronds large, deeply pinnatifid, the pinnules connected at the 

 base by a lobate auricle, strong, rigid in appearance ; elliptical, 

 broadest in the middle, 25 or more cm. long; petiolate, thick, 

 leaving a carbonaceous layer in which the veins are mostly hid- 

 den. Rachis strong, half-cylindrical or compressed in the cast, 

 1 cm. broad at the base, longitudinally striate. Pinnules close, 

 opposite or subalternate, unsymmetrical, much enlarged above 

 the base, sloping at first abruptly, then gradually, to a lanceolate 

 apex, situated at right angles to the rachis, straight, or curving 

 up slightly at the apex, scythe-shaped, 10 to 17 mm. distant, 6 

 to 7 cm. long in the middle of the frond, sessile at the base, 

 connected by a lobate auricle. Borders entire, straight or ir- 

 regularly undulate. Apex small, rounded. At the center of 

 the frond the lobes between the pinnules are approximately 

 twice as long as broad, about 9 mm. long, 4 or 5 wide, half 

 cut off from the pinnule above by a sharp incision at the base 



