954 Cretaceous Floras of Canada. 
The second of these plant horizons, separated according to Dr. 
G. M. Dawson, by a considerable thickness of strata, is that which 
he has called the Mill Creek series, and which corresponds very 
closely with that of the Dakota group, as described by Lesquereux, 
and that of the Atané and Patoot formations in Greenland, as 
described by Heer. This fills a gap indicated only conjecturally 
in the section of 1883. Along with the plants from the Dunvegan 
group of Peace River, described in 1883, it would seem to represent 
the flora of the Cenomanian and Senonian divisions of the Creta- 
ceous in Europe. 
Above this we have also to intercalate a third sub-flora, that of 
the Belly River series at the base of the Fort Pierre group. This, 
though separated from the Laramie proper by the marine beds of 
the Pierre and Fox Hill groups, more than 1,700 feet in thickness, 
introduced the Laramie or Danian flora, which continues to the top 
of the Cretaceous, and probably into the Eocene, and includes 
several species still surviving on the American continent, or repre- 
sented by forms so close that they may be varietal merely. 
Lastly : the subdivision of the Laramie group, in the last report 
of Dr. G. M. Dawson, into the three members known respectively 
as the Lower or St. Mary River series, the Middle or Willow Creek 
series, and the Upper or Porcupine Hill series, in connection with 
the fact that the fossil plants occur chiefly in the lower and upper 
members, enables us now to divide the Laramie flora proper into 
two sub-floras, an older, closely allied to the underlying Belly River 
series ; and a newer, identical with that of Souris River, described 
as Laramie in Dr. G. M. Dawson’s Report on the 48th Parallel, 
1876, and in the Report of the Geological Survey of Canada for 
1879, and which appears to agree with that known in the United 
States as the Fort Union group, and with the so-called Miocene of 
Heer from Greenland. 
From the animal fossils and the character of the flora, it would 
seem probable that the rich flora of the Cretaceous coal fields of 
Vancouver Island is nearly synchronous with that of the coal- 
bearing Belly River series of the western plains. 
It will thus be seen that the explorations already made in Cana- 
dian territory have revealed a very complete series of Cretaceous 
plants, admitting, no doubt, of large additions to the number of 
species by future discoveries, and also of the establishment of con- 
