162 
ALASKA GEOLOGY 
abundant in arctic lands. Every collection from Alaska 
contains numerous examples of this species. The closely 
allied T. tinajorum was described originally from Port 
Graham, Alaska. Juglans acuminata was found by 
Heer at Port Graham also, though first described from the 
European Miocene. Corylus macquarrii has quite a 
wide distribution, but is especially abundant in Alaska. 
It has also been reported from the Fort Union beds of 
Montana and British Columbia, and doubtfully from the 
Laramie. Alnus corylifolia has been reported from 
Cook Inlet. Ulmus braunii , described from the Swiss 
Miocene originally, has been reported from Kamloops, 
British Columbia, in strata of probable Eocene age, and 
from the Green River beds at Florissant, Colorado. Acer 
trilobatum , as already pointed out, is too poorly preserved 
to admit of full identification. A form of this species has 
been found at Herendeen Bay, but it is not possible to say 
that they are identical. Andromeda grayana was origi¬ 
nally made known from Port Graham, Alaska, but has 
since been rather doubtfully identified from one or two 
other localities. 
From this hasty review it appears that four of the ten 
species have never been found outside of Alaska, while 
the remainder are abundantly characteristic of the same 
region. 
It is hardly necessary at this time to go into a history 
of the plant-bearing horizons of Alaska, as this has been 
fully done in my Review of . the Fossil Flora of Alaska. 1 
It is sufficient to state that the named species above 
enumerated are typical of the so-called 6 Arctic Miocene,’ 
which is now regarded as of the age of the Upper Eocene. 
The species described in this paper as new are in various 
ways allied to forms characterizing this horizon, and I do 
not hesitate to refer this collection to the Upper Eocene. 
1 Proc. U. S. Nat. Mus., vol. xvn, pp. 207-240, pi. ix, 1894. 
