426 University Geological Survey of Kansas. 
tions are close and the scales much overlapping. The scales 
are plainly uninerved. 
Formation and locality: Cherokee shales, Lansing. 
SPHENOPHYLLALES. 
SPHENOPHYLLEZ. 
Sphenopkyllum BRONGNIART. 
Sphenophyllites Brongniart, Mem. Mus. Nat. Hist., vol. 8, p. 209, 1822. 
Sphenophyllum Brongniart, Prodrome, p. 65, 1828. 
Sphenophyllum cuneifolium (Sternb.) Zeiller. Pl. LIII, fig. 4. 
Several specimens of this species have been obtained from 
Lansing. These have six slender leaflets to the verticil, slightly 
united or rarely free to the base, elongate, slightly broader at 
the apex than at the base. The apex is sharply toothed, and 
more or less distinctly cut down the middle. Two veins leave 
the base, one or both of which branch within 1 mm. of the 
base; the four veins then continue simple and enter the teeth. 
The leaflets are from 5 to 6 mm. long, about 2 mm. wide, and 
have three to six teeth. These specimens are very much like 
the S. cuneifoltum found at Clinton, Mo. The species is 
abundant in the Chanute and Lawrence shales.. The leaflets 
of these specimens are for the most part very narrowly cu- 
neate, long, and almost always bifurcate. The specimen from 
Twinmound, photographed on plate LIII, figure 4, has close 
internodes, about 8 mm., verticils of six narrowly cuneate, 
bidentate, six- to eight-toothed leaflets; two veins leave the 
base and soon fork, one or both branches forking again about 
the middle of the leaflet. The surface is rough and dark, the 
veins thin. The leaflets are somewhat unequal, the lower 
ones being perhaps smaller, 6 to 7 mm. long, 3 to 314 mm. 
wide, the lateral 7 to 9 mm. long, 3 to 4 broad. The lower 
leaflets, however, are bent back over the node, thus causing 
them to seem, perhaps, shorter than they really are. The in- 
ternodes are marked by four or five strong ridges. The largest 
leaflets observed in the Lawrence shales are 12 mm. long, 3 
to 4 wide, narrowed to a very slender point of attachment, and 
have about eight veins ending in as many teeth. 
Formation and locality: Cherokee shales, Lansing; Cha- 
nute shales, Thayer; Le Roy and Lawrence shales, Lawrence. 
