154 ALASKA GEOLOGY 



Corylus harrimani sp. nov. 



Pl. XXIII, fig. I. 



Leaves of immense size, coriaceous in texture, broadly ovate or 

 elliptical, heart-shaped at base ; margin coarsely and irregularly den- 

 tate ; midrib very strong; secondaries about 9 pairs, very strong, 

 mainly alternate, lowest pair nearly at a right angle, others at an angle 

 of about 45, all craspedodrome and with several branches on the 

 lower side which also end in marginal teeth ; nervilles numerous, very 

 strong, percurrent, at right angles to the secondaries ; finer nervation 

 producing large areolae. 



The specific name is given in honor of Mr. E. H. Harriman, the 

 patron of the Expedition. 



This splendid species is represented by the nearly perfect example 

 figured and by a few fragments. This specimen is rather elliptical- 

 cordate in shape, being 20 cm. in length and about 17 cm. in width. 

 It is well shown by the figure. 



That this leaf belongs to Corylus seems certain. It is much the 

 same in appearance as certain leaves referred to C. macquarrii, but it 

 is of nearly four times the size of the leaves of that species and more- 

 over differs in certain details. In general appearance it perhaps ap- 

 proaches closest to C. scottii Heer, 1 from Spitzbergen, but it is twice 

 as large and differs in shape. The marginal dentition is, however, 

 much the same. 



Corylus ? palachei sp. nov. 



pi. xxn, fig. 2 ; pi. xxvni, fig. i. 



Leaves in general of small size, coriaceous, ovate or ovate-oblong, 

 truncate or very slightly heart-shaped at base, rather obtuse at apex ; 

 margin coarsely and unequally toothed, the teeth sharp and almost 

 spiny pointed ; midrib strong, straight or slightly flexuose ; secondar- 

 ies thin, 7 or 8 pairs, basal ones at a low angle, others at an angle of 

 about 45, craspedodrome, often with two or three short branches 

 which end in teeth ; nervilles numerous, mainly percurrent. 



The specific name is given in honor of Dr. Charles Palache, one of 

 the geologists of the Expedition. 



This species is represented by a considerable number of specimens, 

 all of which agree closely. They are about 5 cm. in length and 4 cm. 

 in width. 



I am somewhat uncertain as to the genus to which these leaves 

 should be referred. They appear to be the same as certain leaves from 



1 F1. Foss. Arct., vol. iv, Abth. i, p. 73, pi. xxix, fig. i, 1876. 



