636 General Notes. : [J uly, 
Hill division. Of these the lower and upper contain fossil plants, 
more especially the latter, and corresponding horizons can 
recognized by these in both of the great areas above referred to. 
The flora of the lower division has a close alliance with that of 
the Belly River group of the underlying Cretaceous, while that of 
the upper division is in the main identical with that of the Fort 
Union group of the. United States geologists, as described by 
¢ Newberry and Lesquereux. 
In the Eastern area the lower beds of the Laramie rest on the 
Fox Hill group of the Cretaceous, and are in turn unconformably 
overlaid in the Cypress hills by beds referred, by Professor 
Cope on the evidence of mammalian remains, to the White River 
, division of the Miocene Tertiary. Thus the geological horizon of 
the Laramie is fixed by its stratigraphical relations as between 
the Upper Cretaceous and Lower Miocene formations. The evi- 
dence of fossil remains accords with this position. The Lower 
È Laramie has afforded reptilian remains of Mesozoic aspect, asso- 
ciated with fishes and mollusks, some of which are of Eocene 
: types, according to Cope and Whiteaves, and its flora is akin to 
that of the Upper Cretaceous. The Upper Laramie has afforded 
a flora so modern in aspect that it has even been regarded as 
Miocene, though in reality not later in age than the Eocene. The 
Willow Creek or Middie Laramie division may therefore (as sug- 
oY gested by the author in his memoir of last year on the Western 
Cretaceous) be regarded as the transition from the Cretaceous tO 
the Eocene. : 
Miocene period, and these difficulties cannot as yet be shi 
overcome, though they are gradually being removed. In Canada, 
since the plants began to be collected and studied, there has hs 
_ little doubt on the subject, and the author now, as herana 
=, holds tothe correlation with the Laramie flora of the so-ca i 
Miocene of Mackenzie river, Alaska, Greenland and Spitzberge > 
and believes that they should be regarded as not newer 
Eocene. : oE 
The greater part of the paper is occupied with the dnt 
_ Of the fossil plants of the formation, including those collecte h 
e Eastern area by Dr. Selwyn and Dr. G. M. Dawson, a 
_ €xogenous trees, all belonging to modern genera, as Platani 
ar ; a 
chestnut and coniferous trees of the genera Taxodium, see f 
