106 



at irregular distances, curving in various directions, less parallel than in the 

 other species, with only two or three marginal veinlets at right angles to the 

 medial nerve, but none descending into the narrow border below the point of 

 attachment of the petiole. 



Fig. 3, PI. xix, is a fragment of a smaller leaf, which has the same rough 

 surface as the others of this species. It has, too, the same irregularity in the 

 distance of its secondary veins, but the base of the middle nerve is not thick- 

 ened, and is more prolonged downward, forcing a deflection of the borders, 

 and thus a less truncate or more wedge-form base. 



Habitat. — South of Fort Harker, Kansas ; not rare. 



Protophyllum haydenii, Lesqx., PI. xvii, Fig. 3. 



Leaves small, coriaceous, smooth, ovate-oblong, pointed, deeply and irregularly tmdnlate-lobed, 

 abruptly rounded to the base ; secondary veins parallel ; basilar veins tbiu, undulate, two or tbree on 

 each side of the medial nerve, at a right augle to it. 



Pterospermites haydenii, Lesqx., Hayden's Report, 1871, p. 302. 



Besides other more fragmentary specimens, the species is represented 

 by a leaf 9 centimeters long, 5 to 6 centimeters wide, oblong, broadly lanceo- 

 late-pointed, deeply undulate all around or irregularly marked on the borders 

 and in the middle by short, obtuse, irregular lobes; strongly pinnately-veined to 

 the base, with lateral veins thick, parallel, all under the same angle of diverg- 

 ence of 50°, and thin, simple basilar veins at a distance of the lateral ones 

 and near the base of the leaf, diverging at a right angle from the medial 

 nerve, flexuous, three on one side and two on the other. The secondary 

 veins are less branched than in any of the former species. I have compared 

 this species, in report loc. cit., to P. spectabilis, Heer, (Fl. Arct., p. 480, 

 PI. xliii, Fig. 15 b .) The leaf has, indeed, some likeness to it by its general 

 outline ; but the direction of the more numerous and craspedodrome lateral 

 veins in the Cretaceous leaf is far different. 



Habitat. — South of Fort Harker, Mudge. 



Protophyllum (?) mudgei, Lesqx., PL xviii, Fig. 3. 



Leaf coriaceous, ovate, obtuse, enlarged and truncate at the base, equally denticulate ; medial nerve 

 very thick ; secondary veins alternate, thick, more or less branching, craspedodrome. 



Quercus mudgei, Lesqx., Hayden's Report, 1871, p. 302. 



Leaf ovate, apparently tapering to an obtuse point, (the upper part is 

 broken,) 6 centimeters broad near the base, where the leaf is the largest, 



