26 SIR J. W. DAWSON ON THE FOSSIL PLANTS 
Shaganappi Point, exhibit a peculiarity which seems to have been absent or concealed in 
the specimens studied by Newberry and Lesquereux, in the presence of two short basal 
lobes, extending backward on the petiole. Each of these is about an inch in length, 
pointed, and with one strong exterior tooth and two delicate nerves, one extending to the 
point and the other to the tooth. It does not certainly appear whether these basilar lobes 
are separate or united in the middle. If the latter, they would present some resemblance 
in mode of attachment to the Cretaceous leaves known as Protophyllum, and to the 
Tertiary species of Pterospermites, from which, however, this leaf differs materially in 
other respects. These peculiar basal lobes are preserved only in a few of the specimens. 
In Dr. Selwyn’s specimens the petiole is four inches long in a specimen about a foot 
in diameter. It is channelled, woody in texture, and with an articulating surface at the 
proximal end. This and its great abundance on certain surfaces, shows that the leaf 
belonged to a deciduous tree, which, from the localities cited by the authors already 
named, must have been widely distributed, though as Lesquereux remarks, especially 
abundant to the north. 
It is to be hoped that further research will disclose the fruit of this remarkable tree, 
and thus make its affinities more certainly known. In the meantime, I think it well to 
retain Newberry’s name, as having priority, and quite as likely to be correct as any other. 
If a Platanus, the tree must, as Newberry remarks, haye borne somewhat the same relations 
to our sycamores which Acer macrophyllum of the West Coast bears to the other maples. 
This species would seem to be specially abundant in the “ Second Group” (Evanston, 
Mount Brosse, etc.) of Lesquereux’s arrangement of the Lignitic flora. 
In the sandstones and shale of the Upper Laramie at Shaganappi Point, near Cal- 
gary, I found these leaves very abundant, and showing the same characters with Dr. 
Selwyn’s specimens from the Souris. Fragments referable to this species also appear in 
Mr. Tyrrell’s collections from another locality on the Bow River, and from disturbed beds 
in the foot-hills to the north; and a very similar, if not the same species, occurs in the 
Belly River series, near Medicine Hat. 
PLATANUS RayNnoupsu, Newberry. 
Newberry, loc. cit. Lesquereux, Tertiary Flora. Dawson, loc. cit. 
Very abundant with the last at Shaganappi Point. The leaves present many differ- 
ences in size and form, but all of these fall within the limits of the descriptions and figures 
of Newberry and Lesquereux. This is a well known species of the Fort Union division 
in the United States. 
Collected by G. M. D. 
PLATANUS HAYDENTI, Newberry. 
Newberry, loc. cit. Lesquereux, Tertiary Flora. 
A leaf not well preserved, but identical, so far as venation and general form are con- 
cerned, with the Fort Union species named above, occurs in Mr. Tyrrell’s collections from 
sandstones of the Upper Laramie on the Bow River. It is associated with leaves of P, 
nobilis. 
CORYLUS ROSTRATA, Ait. 
Newberry, loc. cit. Report on 49th Parallel. 
