362 GEOLOGICAL SUKVEY OF THE TERRITORIES. 



from twelve to thirty centimeters broad between the points of the lateral 

 lobes ; these are turned upward in the normal form, the angle of diver- 

 gence of the lateral veins being 40° to 50°, with a very deep coarse 

 nervation. The borders of the lobes are more generally dentate, and the 

 veins, therefore, mostly craspedodrome. 



I was disposed to consider as a separate species the leaf represented, 

 fig. 1, greatly differing by its diminutive size, the direction of the lobes, 

 and the still broader nervation. These leaves, of which we have two 

 specimens, have the surface runcinate, or appearing as if they were not 

 fully unfolded ; they represent probably a peculiar form or variety of the 

 same species, for, except this difference, the characters are the same. 



Habitat. — South of Fort Harker, Kansas, Chs. Sternberg. 



Protophyllum Sternbergii, Lesqx., Cret. Flora, p. 101, PI. XVI 



PI, XVIII, fig. 2. 

 Leaves large, coriaceous, peltate entire, rounded or cordate at base, grad 

 ually narroived up into a slightly obtuse point ; basilar veins one or two pairs 



Protophyllum Leconteanum, Lesqx., Cret. Flora, p. 103, Pi. XVII 



fig. 4; PL XVI, fig. 1. 



Leaves coriaceous, round, more enlarged in the middle, entire; middle 

 nerve thick, loicest secondary veins much divided, basilar veins in right 

 angle to the middle nerve proportionally thick. 



Protophylltjm % Xebrascense, Lesqx., Cret. Flora, p. 103, PI. XXVII, 



fig. 3. 



Leaf small, subcoriaceous, oval-oblong, abruptly narrowed to the petiole ; 

 borders entire, middle nerve thin, secondary veins close, parallel, all under 

 the same angle of divergence. 



This leaf is by its character referable to the generic division of the 

 Hamamelites, and clearly related to the leaf of our PI. VII, fig. 4. 



Protophylltjm quadratum, Lesqx., Cret. Flora, p. 104, PI. XIX, fig. 1. 



Leaves thickish, subcoriaceous, round-square in outline ; truncate at the 

 base and subpeltate, deeply undulate, obtuse; nervation thick, secondary 

 veins straight to the borders. 



Protophyllttm minus, Lesqx., Cret. Flora, p. 104, PI. XIX, fig. 2; 

 PI. XXVII, fig. 1 ;— PL V, fig. 6. 



Leaves small, coriaceous, broadly ovate, truncate or subcor date at the base ; 

 entire or slightly undulate, subpeltate. 



These different forms of Protophyllum are clearly defined and preserve 

 their characters in the numerous specimens which I have had for exam- 

 ination. PL IV, fig. 0, shows a very small leaf of this species, repre- 

 senting in miniature the large forms described in the Cret. Flora. 



Protophyllum multinerve, Lesqx., Cret. Flora, p. 105, PL XVIII, 



fig. 1. 

 Leaves of medium size, coriaceous, oval-oblong, round-truncate at the base, 

 peltate, middle nerve thick, secondary veins close, numerous, in an open 

 angle of divergence, the lower ones in right angle and deflecting downward, 

 borders entire or undulate. 



Protophyllum rugosum, Lesqx., Cret. Flora, p. 105, PL XVII, figs. 1 

 and 2; PL XIX, fig. 3. 



Leaves deltoid-ovate, rounded and subpeltate at the base, borders entire; 

 nervation coarse, surface rugose, secondary veins irregular in distance and 

 direction. 



