104 



about the same basilar form, and also on each side one single basilar veinlet, 

 anastomosing in following the borders with the divisions of the vein above. 

 But the difference is great indeed, especially in the narrow medial nerve of 

 the American leaf, in its straight, craspedodrome, secondary nerves, and its 

 form. 



Habitat. — Hills near Decatur, Nebraska ; the only leaf as yet referable 

 to Protophyllum from that State. 



Peotophyllum quadkatum, Lesqx., PI. xix, Fig. 1. 



Leafthickish, round-square in outline, truueate at base, subpeltate, deeply undulate, obtuse ; nerva- 

 tion tbick, craspedodrome. 



Pterospermites quadratus, Lesqx., Hayden's Report, 1871, p. 301. 



Leaf large, 13 centimeters both ways, coriaceous, deeply undulate, sub- 

 peltate ; secondary veins thick, moderately branching, at an open angle of 

 divergence, parallel ; basilar veins open, the lower pair at right angle to the 

 the medial nerve, even curving downward, with two thin veinlets under them, 

 decurring down the border-base which covers the petiole, either continuous or 

 auricled. This leaf is not comparable to any published until now from the 

 Cretaceous flora of Europe. 



Habitat. — South of Fort Harker, where I found it in numerous speci- 

 mens, none, however, as perfect as the one figured here, which was commu- 

 nicated by Professor Mudge. 



Peotophyllum minus, sp. nov., PI. xix, Fig. 2 ; PL xxvii, Fig. 1. 



Leaves coriaceous, small, ovate, largest near tbe base, truncate or abruptly rounded, entire or slightly 

 undulate on tbe border, subpeltate. 



This species is, perhaps, a variety of the former. The leaves are smaller 

 and less deeply undulate, but the general fades is the same. The secondary 

 veins are more numerous or less distant, but straight to the borders in both 

 species, and the disposition of the marginal veins at the base, like the subpeltate 

 basilar borders, are also of the same character. In Fig. 2 of PI. xix, the sec- 

 ondary veins, though running to the borders, do not mark them with undu- 

 lations or small, slightly-protruding lobes. The borders of this leaf are, how- 

 ever, apparently somewhat reflexed and imbedded into the stone in such a 

 way that the outside margin cannot be distinctly seen. It is separated from 

 the former species by the differences indicated. Perhaps intermediate forms 

 may be found hereafter. 



