70 ROYAL SOCIETY OF CANADA 
ALNITES CURTA, Dn. 
Dawson, Trans. R. Soc. Can. (1890), VIII., iv., 86. 
Originally described by Sir William Dawson from the Lower 
Miocene of the Similkameen River, on the basis of leaf and fruit. It 
appears in the Miocene of the Horsefly as leaves only. 
BETULA STEVENSONI, Lesq. 
Lesquereux, Tertiary Flora (1878), VII., 139, Pl. XVIII. 
As described by Lesquereux, this species is already known in the 
Laramie of Wyoming. In the Miocene of the Horsefly, it appears 
in the form of imperfectly preserved leaves of varying sizes, but with 
characteristic venation and margins. 
PLANERA LONGIFOLIA, Lesq. 
Lesquereux, Tertiary Flora, VII., 189, Pl. XXVII., 4-6. 
Cretaceous and Tertiary Floras (1883), VIII., 161, Pl. XXIX., 1-3. 
This species occurs in the Green River Group of Wyoming, and 
now reappears in the Miocene of the Horsefly as fragments of leaves, 
often in a very imperfect state of preservation. 
ARALIA NOTATA, Lesq. 
Lesquereux, Tertiary Flora (1878), VII., 237, Pl. XXXIX., 2-4. 
Several fragments of leaves with characteristic venation. 
ACER DUBIUM, n. sp. 
One specimen showing the wing of a fruit but no seed vessel. 
This was correctly referred to the genus Acer by Sir William Dawson, 
but as the material is altogether insufficient for accurate diagnosis, 
it is provisionally assigned to A. dubium. 
NELUMBIUM PYGMÆUM, Dn. 
Dawson, Trans. R. Soc. Can. (1890), VIII., iv., 87. 
Two imperfectly preserved leaves only. The only other locality 
for this species is on Mill Creek, Similkameen River, and therefore 
Lower Miocene. 
