I S4 
ALASKA GEOLOGY 
Corylus harrimani sp. nov. 
pi. 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 0 , 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. scot til 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. xxii, fig. 2; pi. xxviii, fig. 1. 
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 0 , 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 FI. Foss. Arct., vol. iv, Abth. 1, p. 73, pi. xxix, fig. 1, 1876. 
