103 

 Protophyllum leconteanum, Lesqx., PL xvii, Fig. 4; PI. xxvi, Fig. 1. 



Leaves coriaceous, round, uioro enlarged in the middle, entire ; medial nerve thick ; lowest secondary 

 veins much divided ; basilar veins in right angle to the medial nerve, proportionally thick. 



Crcdmr'ia leconteana, Lesqx., American Journal of Science and Arts, loc. cit., 

 p. 98. 



This species is represented by two fragmentary leaves, with the lower 

 part destroyed in both. The nervation is of the same type as in the former 

 species, differing, however, by the greater thickness of the medial nerve and 

 by the more numerous divisions of the lateral veins. In both species the 

 divergence of these veins is the same, (40° to 70°,) gradually increasing in 

 width from the top to the base, and in both, also, the veins and their divi- 

 sions run to the borders, where they become more or less effaced by the 

 anastomosis of the nervilles, which are coarsely marked, in a right angle to 

 all the divisions of the veins, and more or less continuous. Besides the dif- 

 ference marked in the character of the nervation, this species is still further 

 separated from the former by its round outline and broadly obtuse point. 



Habitat.- — Brooksville, Kansas, Leconte; the small specimen from south 

 of Fort Harker. The localities where the specimens of Dr. Leconte were 

 obtained (three miles northeast of Fort Harker and near Brooksville) are 

 eight to ten miles north of the one where I mostly collected my own, which 

 are marked in this report as near Fort Harker. 



Protophyllum nebrascense, sp. nov., PI. xxvii, Fig. 3. 



Leaf small, subcoriaceous, oval-oblong, broadly cuneate to the petiole ; borders entire ; medial nerve, 

 thin ; secondary veins close, parallel, all under the same angle of divergence. 



This leaf differs in its characters from those described from Kansas. 

 It is comparatively very small ; its surface somewhat rough, though its sub- 

 stance is not as thick; the form is oval-oblong, the borders in the middle 

 being apparently parallel, and its base is rounded broadly-conical to the petiole; 

 the secondary veins, all under the same augle of divergence of 40° to 50°, are 

 thin, parallel, camptodrome, straight, with a single thin marginal veinlet on 

 each side from below the lowest pair of the secondary veins. This vein follows 

 the borders, anastomosing with nervilles of the divisions of the lower veins 

 which are camptodrome, while the primary divisions are craspedodrome. 

 The leaf is not peltate, the narrow primary nerve being prolonged into a short, 

 apparently broken petiole. It may be compared to Credncria integerrima, 

 Zenker, as represented in Paleont., (Vol. V, PI. ix, Fig. 2,) which has 



