A10 Unwersity Geological Survey of Kansas. 
This common and variable species occurs in the Cherokee 
shales and has been observed to extend as high as the Garrison 
formation at the top of the Upper Coal Measures. It is one of 
the abundant species throughout the series. The not incon- 
siderable change which the species undergoes during its long 
existence has led to its being recorded in earlier American lit- 
erature under a variety of names, and has brought about much 
confusion in regard to its limiting characters.. The common 
typical examples, with pinnules of medium size, have been com- 
monly known as Neuropteris loschu, while the long, proportion- 
ally narrow, pinnules from the larger pinne are probably the 
same as those included by Lesquereux under the name N. pli- 
cata. Several large specimens in the University of Kansas col- 
lection from Thayer, Kan., indicate the immense size of the 
fronds. The large primary pinne has a strong, woody, flexu- 
ous rachis, with subopposite distant secondary pinnze, between 
which are attached, directly to the rachis of the primary pinna, 
numerous ultimate pinnee, 12 to 15 cm. long. The pinnules on 
this large frond are narrowly elongate, 18 to 25 mm. long, 8 to 
10 mm. wide, the veins counting 35 to 40 per centimeter. Other 
specimens show that the secondary pinnee were large, probably 
not less than a meter in length, the entire frond being no doubt 
several meters long. The specimens from the higher horizons 
show constantly broadly oblong or ovate pinnules, often dis- 
tantly separated, with a flat, thin, flexuous rachis bending to 
meet the attachment of each pinnule. This later development 
of the species should perhaps receive a varietal name as mark- 
ing a phase of the species found in high Coal Measures deposits. 
Formation and locality: Cherokee shales, Lansing; Chanute 
shales, Thayer; Le Roy and Lawrence shales, and the Scranton 
shales, Scranton; Wabaunsee formation, Emporia; Chase for- 
mation at Washington. 
Neuropteris hastata D. W. Pl. XLVIII, fig. 6; pl. XLIX, fig. 5. 
Bull sNow2i SU Ss Gases gir 
Fronds probably large; ranchises occurring with and prob- 
ably belonging to the species 3 cm. wide, marked with many 
rather fine longitudinal striz. Ultimate pinne linear, at right 
angles. Rachis slender, striate. Pinnules alternate, large, 
3 to 5 em. long, 1 to 214, mm. wide at the widest part, unequi- 
lateral, lower side much the larger, unsymmetrical in shape, 
broadest a little above the middle, then contracted rapidly to 
