A406 Unversity Geological Survey of Kansas. 
the pinnule. The forking of the veins is at a comparatively 
wide angle. The species is not uncommon at the Lansing 
mine, and is represented in the University collection by an 
excellent series of specimens which agree fully with Mazon 
Creek forms, from which locality the first figured specimens 
of the species were obtained. Although variable in the vena- 
tion the species is easily recognized by the compact pinneze, the 
large pinnules directly at right angles, very obtuse, veins fine, 
distant near the center, close at the border. Many of the 
Lansing specimens are of a bright green color, having appar- 
ently retained the natural chlorophyll coloring of the leaf. 
Some of the large pinnules of N. missouriensis resemble this 
species but are readily distinguished by the rounded base and 
the uniform distribution of the veins throughout the lamina. 
Formation and locality: Cherokee shales, Lansing, Kan. 
Neuropteris rogersi Lx. Pl. XLVIII, figs. 1, 12; pl. LIX, fig. 1. 
Neuropteris speciosa Lesquereux, Journal Boston Soc. Nat. Hist., 
vol. 6, p. 417, 1854. 
Neuropteris rogersi Lesquereux, Geol. of Penn., vol. 2, pt. 2, p. 
856, pl. 8, fig. 2, 1858; Schimper, Paleont. Veget., vol. 1, p. 455, 
1869; Lesquereux, Coal Flora, p. 83, pl. 6, figs. 7-10, 1880. 
Fronds pinnate or bipinnate. Pinnules, or ultimate pinne, 
large, very variable in shape and size, oblong-lanceolate, 
sloping very gradually from the base to the obtusely pointed 
apex, or more broadly oblong, or even becoming circular in 
some, probably cyclopterid pinnules. The oblong pinnules are 
from 5 or 6 to 15 or more cm. long, 2 to 4 or 5 cm. wide; the 
oval ones 4 to 6 or more cm. long, 3 to 5 cm. wide. Pinnules 
probably open or inclined somewhat, as indicated by the up- 
ward curve and slight inequality of the basal auricles, the 
lower being often a little larger; texture smooth and shining, 
rather resistant. Pinnules apparently not petiolate, but at- 
tached to the rachis by a slightly projecting, thickened por- 
tion of the lamina about 114 mm. wide, made up of facicles 
of nerves. Base deeply auricled, symmetrical, or the lower 
auricle larger, projecting downward. Apex of the elongate 
pinnules obtusely pointed with a slight thickening and en- 
largement at the very point, caused apparently by the meet- 
ing of the converging lateral veins. The rounded pinnules 
show also the peculiar enlargement at the top. Borders of 
some entire or merely undulating, of others more or less deeply 
lobed, the lobes separated by obtuse sinuses. Venation very 
