ATA Explanation of Plates. 
PLATE LI. 
Fic. 1.—Alethopteris grandini (Brongn.) Goep.? A fertile pinnule, re- 
ferred with some doubt to this species. The venation is obscured. 
The sporangia seem to be arranged in rows from the midrib to the 
border, as in the case of the living genus Danza, or the Coal Measures 
genus Danzites. From the Le Roy shales. No. 1986, University of 
Kansas collection. Three times natural size. 
Fic. 2.—Sigillaria sp. A large species with thin, rough cortex and dis- 
tant leaf-scars. The decorticated surface is very rough and marked 
with longitudinal striz. The lateral cicatricules are very large and 
have a pitted surface. From the Le Roy shales at Blue Mound. 
No. 4316, University of Kansas collection. Natural size. 
Figs. 3, 4.—Basal part of a very slender lycopod leaf, showing the form 
of the scar to which it was attached. From the Lawrence shales, Uni- 
versity Hill. No. 5502, University of Kansas collection. Natural size. 
Fig. 5.—Lepidodendron clypeatum(?) Lesqx. From the Cherokee shales 
at Lansing. No. 5445, University of Kansas collection. Natural size. 
Fic. 6.—Sigillaria sp. An area from the surface of a large trunk marked 
by longitudinal ribs, with a single row of scars on each rib. From the 
Cherokee shales at Lansing. No. 4340, University of Kansas collec- 
tion. Natural size. 
Fic. 7. Genus undetermined. Thin, delicate leaves, with a clear, trans- 
parent lamina, traversed by a single vascular strand. The fronds 
are dichotomous and were of considerable length. They occur in 
abundance in the Le Roy shales at the Haverkampf farm. Nos. 5675 
and 5677, University of Kansas collection. Natural size. 
Fic. 8.—Sigillaria brardi Brongn. A small area from the trunk of a 
large tree, showing the form and arrangement of the leaf-scars. 
From the Le Roy shales at Blue Mound. No. 4891, University of 
Kansas collection. Natural size. 
Fig. 9.—Lepidodendron sp. From the Cherokee shales at Lansing. No. 
4450, University of Kansas collection. Natural size. 
Fic. 10.—Genus undetermined. From the Le Roy shales. No. 5678, Uni- 
versity of Kansas collection. Natural size. 
Fic. 11.—Cardiocarpon branneri Fairchild and D.W. mns. An un- 
usually well-preserved seed of this species. The seed is small, flat, the 
nucleus covered with fine hairs. From the Bethany Falls limestone 
at Kansas City, Kan. No. 5490, University of Kansas collection. 
Natural size. 
Figs. 12, 13.—Cardiocarpon sp. Seeds of a type very abundant in the 
Le Roy shales. No. 5493, University of Kansas collection. Natural 
size. 
Fig. 14.—Trigonocarpum sp. From the Lawrence shales. No. 5489, Uni- 
versity of Kansas collection. Natural size. 
