44? University Geological Survey of Kansas. 
These scars will be more fully described in treating of the 
teniopterids of the formation. 
Formation and locality: Wellington shales, Banner City, 
Dickinson county. 
-Glenopteris simplex Sellards.” 
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, dis- 
tinctly 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 
characteristic. It is large in proportion to the frond, some- 
what irregular in shape, sloping slightly to an obtuse apex. 
In a frond 15 cm. long, the terminal pinnule is 2 cm. long. 
Midvein distinct, decurrent, running down the rachis 1 or 2 
mm. before uniting with it, continuing almost to the apex. 
Lateral veins oblique, strong, simple or forking once, almost 
straight or distinctly curved, 10 or 12 per centimeter at the bor- 
der. Veins strongly curved in passing from the rachis to the 
auricled base. The midvein of the pinnule becomes less marked 
in pinnules nearing the apex of the frond, lateral veins more 
pronounced, passing gradually into the lateral veins of the 
terminal pinnule. 
This species, the smallest of the genus, is common, and its 
296. Kan. Univ. Quarterly, pp. 184, 185, pl. 37, fig. 2; pl. 38, figs. 2, 3; pl. 39. 
