OF THE LARAMIE FORMATION OF CANADA. 21 
perhaps in so far as the upper member of the former is concerned.’ I have also to observe 
that in the latest report of Mr. Lesquereux* he still seems to retain in the Miocene certain 
formations in the west, which from their fossil plants I should be inclined to regard as 
Eocene. 
In my original studies of the specimens described in this paper, I had examined and 
noted separately the collections from the eastern and western areas; but as these 
obviously correspond in their divisions, and several of the species are identical, I have, to 
avoid repetition, placed the whole together; noting, however, the localities in which the 
specimens were obtained, and their reference to the Lower or Upper divisions. 
I may state here my obligations to the reports of Lesquereux on the Tertiary Flora 
of the United States, and more especially to Dr. Newberry’s Memoir on the Later Extinct 
Floras of America,’ and to the volume of plates published in illustration of it by the 
United States Geological Survey ‘ as these, referring to localities adjoining the Canadian 
boundary and to beds continuous with ours, have proved of the greatest value for 
purposes of comparison. 
II.—DESCRIPTIONS OF SPECIES. 
1. Filices. 
ONOCLEA SENSIBILIS, Linn. 
Newberry, Later Extinct Floras of America, p. 89, and Volume of Illustrations, pub- 
lished by the Geological Survey of the Territories of the United States, 1878. Report by 
Dr. G. M. Dawson, on the Geology of the 49th Parallel, Appendix A. 
Leaves of this species are abundant in the beds of Porcupine Creek, (long. 106°) near 
the international boundary, which are of Upper Laramie age. They are also found in the 
Lower Laramie of the same district at the Bad Lands of Wood Mountain. The species has 
also been recognized in the plant beds of the Isle of Mull on the Scottish coast. These 
were at one time regarded as Miocene, but are now recognized by Mr. Starkie Gardiner as 
Eocene. It is a very common American fern at the present day, ranging from Northern 
Canada to Pennsylvania and southward, and from the Atlantic coast into the interior. It 
vindicates its claim to be a long-lived species by its present wide distribution, and the 
considerable varieties of station in which it can flourish. Though living in America it has 
become extinct in Europe. Newberry describes it from the Fort Union group, in which, 
as well as at Porcupine Creek, it is very abundant. Dr. Newberry notices the fact that 
the fossil fronds are intermediate between the common modern variety and var. obtusiloba 
of Torrey. 
Collected by Dr. G. M. Dawson, whose collections in the remainder of the paper will 
be indicated by the letters G. M. D. 
DAVALLIA (STENOLOMA) TENUIFOLIA, Linn. (Plate I, Fig. 1.) 
Report on 49th Parallel, p. 329, Pl. XVI, Figs. 1 and 2. 
This species is found at Porcupine Creek with the preceding, but is more rare. 1 

! Protection Island beds of my paper, Trans. Roy. Soc. Can., Vol. i. 
* Cretaceous and Tertiary Plants. * Annals of New York Lyceum, 1868. 
‘ Illustrations of Cretaceous and Tertiary Plants, 1878, 
