105 



Habitat. — Salina River, hills eight miles above its mouth. The small 

 specimen (PI. xxvii, Fig. 1) was communicated by Professor Mudge from 

 Fort Lamed, Kansas. 



Protophyllum multinerve, Lesqx., PI. xviii, Fig. 1. 



Leaf of medium size, coriaceous, oval-oblong, round-truncate at the base, peltate ; medial nerve 

 thick ; lateral veins close, parallel, numerous ; borders entire or undulate. 



Ptcrospermites multinervis, Lesqx., Hayden's Report, 1871, p. 302. 



The figured fragment is the most perfect among many others referable to 

 the same species. It is 12 centimeters long, (its upper part is broken,) 11 

 centimeters wide a little above its base, where it is slightly enlarged and then 

 rounded downward and truncate ; its borders are nearly parallel, slightly undu- 

 late ; its medial nerve is comparatively thick, like the numerous, opposite, nearly 

 parallel secondary veins, whose angle of divergence is more and more open 

 toward the base, the lower veins running down from the point of attachment 

 of the peltate leaf in various degrees of inclination, across the broad border- 

 base, which is at least one centimeter wide. This impression of the leaf is 

 apparently that of the lower side, and the petiole has been broken just at the 

 base of the medial nerve. The distinction between the secondary veins and 

 the marginal ones is not clear on account of the similarity of the veins in 

 their thickness and of the slow degree of change in their angle of diverg- 

 ence. Counting from the lowest, thick, branching lateral veins to the upper 

 part where the leaf is broken, there are ten pairs of secondary veins in a space 

 of 9£ centimeters, and under them four or five deflexed smaller veins on each 

 side of the middle nerve near and at its base. 



Habitat. — South Kansas, near Salina River. 



Protophyllum rugosum, Lesqx., PI. xvii, Figs. 1-2 ; PI. xix, Fig. 3. 



Leaves deltoid-ovate, rounded at the subpeltate base ; borders entire ; nervation coarse ; secondary 

 veins irregular in distance and direction. 



Pterospermites rugosus, Lesqx., Hayden's Report, 1872, p. 426. 



The leaves, of a thick coriaceous substance, have a rough surface, deeply 

 furrowed and wrinkled by the veins and the nervilles ; they vary in size from 

 six to twelve centimeters long and from five to nine centimeters wide. They 

 are broadest below the middle, rounded truncate at base, the borders tapering 

 to a deltoid point. The middle nerve is not as thick as in the former species, 

 becoming thicker, however, toward its base. The secondary veins are placed 

 14 L 



