402 University Geological Survey of Kansas. 
ends of the veins. The number of sporangia has not been de- 
termined. 
Formation and locality: From the Lawrence shales at Twin- 
mound. 
Oligocarpia gutbieri? Pl. XLV, fig. 14. 
Fronds probably large. Primary (?) pinne lanceolate or 
narrowly ovate-lanceolate, narrowed to the apex. Rachis flat, 
punctate, finely striate, lax. Ultimate pinnee alternate or sub- 
opposite, close, sometimes overlapping, 1 to 2 cm. apart, open or 
oblique, sessile, linear lanceolate, slightly narrowed from the 
base to the apex, smaller ones ending in a long, narrow, acute 
terminal pinnule; larger pinne more obtuse, reduced toward 
the apex of the frond, becoming first narrow, linear segmented 
pinne, then passing into linear pinnules. Rachis slender, 
rugosely striate, sometimes punctate. Pinnules polymorphous, 
alternate, oblique, or often at right angles, sometimes reflexed, 
attached by the entire base, sometimes a little decurrent. Lam- 
ina strongly arched transversely, rough, rather thick, often 
obscuring the nervation. A typical pinnule at the middle of a 
medium-sized pinna is oblong-ovate, 4 to 6 mm. long, 3 or 4 
broad, narrowed slightly to an obtuse rounded apex, slightly 
connate at the base, or nearly free, separated by an obtuse 
sinus or a wing-like border to the rachis, borders entire, revo- 
lute. Pinnules a little lower on the frond, longer, more narrow 
in proportion to their width, polymorphous, lightly segmented, 
sloping from base to an obtusely pointed apex, 7 to 9 mm. long, 
entirely free, or slightly connate by a narrow wing-like ex- 
tension of the lamina. Pinnules on the small pinne at the top 
short, connate at the base, sloping from both sides of the base 
to the apex, more or less triangular. Pinnules succeeding the 
pinne above at first clearly distinct, undulate, then becoming 
connate, probably passing into a lanceolate terminal pinnule. 
Nervation often obscured by the thick epidermis. Midvein 
turned down slightly at the union with the rachis, effaced near 
the apex. Lateral veins oblique, once or twice forked, curved 
gradually, meeting the border at an obtuse angle. One or two 
simple veins near the apex of the pinnule. Veins rather dis- 
tant, 17 to 20 per centimeter. Fructification scattered irregu- 
larly over the lower surface of the pinnule; sori numerous, ap- 
parently on the ends of the veins, about square, each sorus con- 
sisting of four independent sporangia. 
