444 University Geological Survey of Kansas. 
Glenopteris sterlingi Sellards.”® 
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 lanceo- 
late 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 
irregularly 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 
of the pinnule, connate with the pinnule below, or the outer 
part of the lobe overlapping slightly. In the pinnules approach- 
ing the base of the frond the lobes are progressively less 
strongly developed, entirely disappearing on the reduced basal 
pinnules. Main rachis of the frond brokenly and roughly stri- 
ate throughout its entire length. Midvein of the pinnule mod- 
erately strong, continuing to near the apex, straight or nearly 
so, joining the rachis with a short downward curve. Lateral 
veins indistinct; those of the auricles best preserved. These 
‘leave the rachis with a slight curve, run straight and appar- 
ently simple to the border. In the first auricle six veins can be 
counted in the distance of 3 mm. On some of the pinnules of 
an eroded specimen the lateral veins show indistinctly. They 
leave the midvein obliquely and curve in passing to the borders; 
whether simple or forked, cannot be made out. 
Two specimens of this species are found in the collection. 
The smaller one is well preserved and covered by a thick coaly 
layer, entirely obscuring the venation except in the lobes of 
the auricles. This specimen shows well the distinct lobe be- 
tween the pinnules. The second specimen is of an eroded 
frond, somewhat defaced. The lobate base, however, is well 
shown on some of the pinnules. The species has a very differ- 
ent appearance from others of the genus, due to the odd shape 
of the pinnules and their lobate bases. One large specimen 
298. Kan. Univ. Quarterly, vol. 9, pp. 186, 187, pl. 41; pl. 42, fig. 1, 1900 
