392 Mr. L. F. Ward on Mesozoic Dicotyledons. 
Upper Cretaceous by Heer, are admitted by him to exhibit in 
their fossil remains so close a relationship with the American 
Dakota Group as to render it probable that they are of the 
same age. Patoot, on the other hand, is set down as extreme 
Upper Cretaceous; and Heer says that its invertebrate fauna 
indicates its identity with the Fox Hills of our Western Terri- 
tories. 
The localities in British Columbia from which Cretaceous 
Dicotyledons have come are all regarded by the Canadian 
geologists as Upper Cretaceous. The inland portions, situated 
on the Pine and Peace rivers, are said by Dr. Dawson to cor- 
respond to the Niobrara of the north-western United States, 
which he also correlates with the Lower Senonian of Kurope. 
Vancouver’s Island and the localities on the Pacific coast are 
higher, and are placed in the Upper Senonian, though he . 
does not correlate them with any of the groups of American 
geologists. Fossil plants were found on the Bow and Belly 
river, which is said to agree with the Pierre Group; but the 
dicotyledonous remains appear to have been indistinct and 
undeterminable. 
With the exception of the Dakota Group, which is com- 
monly regarded as Cenomanian, and in which such a profu- 
sion of dicotyledonous vegetation is imbedded, no fossil plants 
have thus far been described from the Cretaceous of the 
Western Territories. Nevertheless, I have myself collected and 
brought to Washington during the past season some dicotyle- 
donous leaves from a locality on the Upper Missouri river 
some seven miles below Coal Banks, whose position is fixed 
with certainty in the Fort Pierre Group, No. 4 of Meek and 
Hayden, which Dr. C. A. White regards as merely forming 
the lower portion of the Fox Hills. The material thus ob- 
tained, though meagre and fragmentary, is sufficient to render 
it quite certain that we here have forms nearly allied to Pla- 
tanus latiloba of Newberry (Sassafras mirabile, Lesqx.), and 
perhaps connecting this with Platanus nobilis, Newb., from 
the Laramie strata that overlie these beds, as well as forms 
resembling Quercus salicifolia, Newb., and other Cretaceous 
genera and species. here is therefore ground for hoping 
that when this and other similar localities are thoroughly 
studied a new Cretaceous flora may come to light in the 
North-west. 
J have in this paper intentionally omitted all consideration 
of the great Laramie Group, although this is regarded by 
many as Cretaceous. This 1s because it seems at least to be 
more recent than any of the Huropean, Arctic, or British- 
American plant-bearing beds, while its abundant flora con- 
