OF THE LARAMIE FORMATION OF CANADA. 2] 
Specimens of leaves so near to the above modern species that they cannot be separated 
from it occur on the Upper Laramie of Porcupine Creek. Newberry has recognized this 
species in the Fort Union group. 
Collected by G. M. D. 
CoryLus McQuarRil, Heer. 
Heer, Flora Foss. Arctica. 
Fragments pretty certainly belonging to this species appear in the collections from 
the Upper Laramie of Porcupine Creek. The species occurs in the Fort Union group, on 
Mackenzie River, and also in the so-called Miocene of Alaska and Greenland. 
Collected by G. M. D. 
CASTANEA, Sp. 
Quercus. Report Geol. Survey of Canada, 1879-80. 
Leaf elongate oblong, margin obtusely dentate at ends of veins, which are rather less 
than a quarter of an inch apart, and at angle of 45° to 47°. Texture coriaceous. 
This leaf occurs in the Upper Laramie of Souris River. It may be the same with 
Lesquereux’s C. intermedia. 
Collected by Dr. Selwyn. 
QUERCUS, Sp. (Plate I, Fig. 8.) 
Leaf long, narrow, with simple straight nerves and entire edges. 
Upper Laramie of Great Valley. 
Collected by G. M. D. 
POPULUS GENETRIX, Newberry. 
Newberry, Joc. cit. 
In the Upper Laramie of Souris River, Great Valley and Shaganappi Point. In the 
publications of Lesquereux and Newberry there are several nearly allied species to which 
this leaf may have belonged; but Newberry’s figure, named as above, has the same 
characters. 
POPULUS ACERIFOLIA, Newberry. 
Newberry, loc. cit. 
Found in Dr. Selwyn’s collections from Souris River; also in Mr. Tyrrell’s collections 
from the foot-hills of the Rocky Mountains, north of Bow River, and in my collections 
from Shaganappi Point. 
PopuLus RICHARDSONII, Heer. 
Fragments of leaves from the Upper Laramie of Porcupine Creek appear to represent 
this species, also found on Mackenzie River. 
Collected by G. M. D. 
Populus ARCTICA, Heer, (Plate I, Fig. 9.) 
Heer, Flora Foss. Arctica. Newberry, loc, cit. 
In the specimens in my possession I cannot certainly separate P. arctica from leaves 
having the character of P. cuneata of Newberry, which may be merely a smaller form. 
Great Valley, G. M. D. Souris River, Dr. Selwyn. 
