A404 University Geological Survey of Kansas. 
meter, many times dichotomous, spreading from the base with- 
out a midrib. 
The absence of a distinct midrib, even in the very large 
pinnules, the pointed apex, and the large square base, are 
prominent characters of this species. The pinnules resemble 
in shape the pinnules of N. clarksoni and of the pointed va- 
riety of N. scheuchzert. The venation is much like that of 
N. scheuchzeri, being very fine, numerous and equally close 
in all parts of the pinnule. The species is distinguished from 
N. clarksoni by the much more numerous veins, and from 
N. scheuchzeri by the square auricled base and the absence of 
basal leaflets. N. anomala is separated by its truncate base 
and fewer veins. WN. decipiens, the only related species ap- 
proaching this one in size, has very obtuse pinnules and fewer 
veins, counting only 24 to 30 per centimeter. 
Formation and locality: Cherokee shales, Lansing, Kan. 
The type specimen was collected by Mr. J. M. Gilman, for 
whom the species is named. 
Neuropteris clarksoni Lx. 
Boston Soc. Nat. Hist., vol. 6, p. 417, 1854; Geol. of Penn., vol. 2, 
pt. 2, p. 857, pl. 6, figs. 1-4, 1858; Geol. Report, Illinois, vol. 2, 
p. 428, 1866; Coal Flora, vol. 1, p. 94, pl. 9, figs. 1-6, 1880. 
Schimper, Traite Paleont. Veg., vol. 1, p. 446, 1869. 
David White, Flora of Southwestern Missouri, Bull. U. S. G. S. 
No. 98, p. 79, 18938. 
Fronds large. Primary rachis strong, dichotomous. Pin- 
nules opposite or subopposite, open or slightly inclined, often 
more or less falcate, sloping to a pointed apex, largest and 
cordate at the base, lower side usually enlarged, attached by a 
strong pedicel, borders usually entire, often undulate. Mid- 
vein rather strong at the base, striate, soon reduced and pass- 
ing to or near the apex as a thin line. Lateral veins given off 
at an acute angle, curving at first but slightly, then more de- 
cidedly, thin, counting about 25 to 30 per centimeter. 
A few specimens have been found at Lansing, Kan., which 
seem to have the essential characters of N. clarkson. The 
pinnules resemble in shape the acuminate variety of N. scheu- 
chzeri found at the same locality, but are easily distinguished 
from that species by the more distant nervation and the ab- 
sence of basal lobes. The nerves of the Lansing specimens 
count 29, 30, and 31 per centimeter. The midvein is stronger 
than that of N. scheuchzeri, is distinctly striated, and can be 
