450 University Geological Survey of Kansas. 
mens, and have no connection with fructification. In my earlier 
treatment of the genus I have compared the scars with Hyster- 
ites and Rosellinites among fossil fungi, and Hysterium and 
Hysteriographium among recent genera. The scars merit a 
more extended comparison with fossil and living fungi than I 
have been able to give them. 
Tzniopteris coriacea Goep. Pl. LXVII, figs. 1, 2; pl. LXVIII, figs. 1, 2; 
pl. LXTX, figs. 1,3. ° 
Flora der Permischen Formation, p. 130, pl. 8, fig. 4; pl. 9, fig. 2, 
1865-’66. 
Txniopteris coriacea Goep., Sellards, Kan. Univ. Quart., vol. 10, 
PD.°2, 3, pl. Py hes) GSA ple 2 HOS wle Ae pleco ai esa lsc plar. 
figs. 1, 3, 1901. 
Fronds simple (?), linear or very narrowly elliptical, coria- 
ceous in texture, broadest in the middle, tapering to a sym- 
metrical lanceolate apex, and a petiolate base, 8 to 20 cm. long, 
average width at the middle, 10 to 20 mm. Rachis strong at 
the base, rough with rather strong longitudinal strize, about 3 
mm. wide, reduced gradually in passing to the apex where it 
becomes a mere line. Fronds slightly rolled at the borders. 
Lateral veins numerous, strong, straight and parallel, cross the 
lamina obliquely, with a slight but distinct upward curve at 
the border, 28 to 32 per centimeter. Veins near the base of the 
frond leave the rachis with a short curve, often forked once 
near their base; those at the middle of the frond only slightly 
curved at their union with the rachis, seldom forked; those 
near the apex not at all curved at their base, always simple, 
straight, or even arched upwards slightly in crossing the lam- 
ina. Oval bodies on several of the fronds, situated between 
the veins, half immersed in the epidermis of the frond, 14 to 34, 
mm. apart, six or seven between each two veins. Elliptical 
elevations or corresponding depressions occur on or near the 
rachis of several specimens. 
The species is a common one, and is represented by many 
good specimens. By reason of the thick, resistant texture, the 
frond is usually well preserved, and forms a natural line of 
cleavage in the matrix, which often breaks so as to expose its 
entire length. The individual specimens vary a good deal in 
size, but can usually be readily recognized by their straight, 
oblique, strong nerves, resistant texture, and lanceolate apex. 
The agreement with Goeppert’s types is not entirely com- 
plete, but essentially so. Goeppert’s figures do not show a 
rolled border, nor does he mention such a character in his de- 
