422 Umversity Geological Survey of Kansas. 
not more than 14, mm. thick; bolsters absent; leaf-scar pro- 
jecting not at all from the cortex, marked by a thin line; scars 
truncate at the top, obtusely rounded at the base, acuminate- 
pointed at the sides, more than a third wider than long. Scars 
on the specimen at hand 15 mm. transversely, 8 or 9 vertically, 
spirally and vertically equidistant 37 mm.; central vascular 
scars transversely elongated. Lateral cicatricules very prom- 
inent, large elongate-ovate marks. The subcorticated surface 
is distinctly longitudinally striate. The surface of the lateral 
cicatricules is thickly set with puncte. The decorticated sur- 
face is deeply marked by the elongate-ovate lateral cicatricules. 
Formation and locality: Le Roy shales, Blue Mound. 
Sgillaria sp. 
Trees large, bark thick and rough, apparently ribbed longi- 
tudinally, striate and rugose scars approximately vertically and 
transversely equidistant. Lateral cicatricules unusually large, — 
distant, elongate-ovate, dotted with puncte and resembling 
those of the species just described, from which the species 
differs, however, in that the cortex is very thick and rough. 
The lateral cicatricules in the largest specimens are 5 to 6 mm. 
distant. 
Formation and locality: Le Roy shales, Blue Mound. 
Leaves of Sigillariacez. Pl. XLVII, figs. 3-6, 9., 
Comparatively few leaves of the Sigillariacex have been fig- 
ured or described. White gives a good description of the leaves 
of Sigillaria found in the Carboniferous basins of southwestern 
Missouri.2®8° Lesquereux figures (Geol. Surv. IIl., vol. 2, pl. 45, 
figs. 6 and 7) two fragments of leaves which may be of this 
genus. Illustrations of a number of specimens will be found 
also in monograph 37 of the United States Geological Survey. 
In connection with the description of a specimen of Szgillaria 
monistigma from Lawrence, Kan., Lesquereux mentions leaves 
3 mm. broad, with a median keel and two lateral ‘“‘veinlets,” 
which are stated to be still attached to the stem.”°® There is a 
remarkable uniformity in the leaves of the Sigillariacex con- 
sidering the number of species as indicated by variations in 
the trunks of the trees. The characters which seem to be com- 
mon to the leaves of the Sigillariacee may be summarized as 
follows: Leaves long, slender, very narrow in proportion to 
289. Bull. U. S. Geol. Surv. No. 98, p. 108. 
290. Coal Flora, vol. 3, p. 7938. 
