75 



Platanus nobilis, Newb. 



Bib: Geol. Surv. Can., 1879-80: Trans. R.S.O., III, 1885; IV, 1886: iv, 24 : Lat. Ex. FI. 

 1868, 67. 



Within the United States this species is known in the Fort Union group at Seven-mile creek, 

 Montana, and the Miocene of the John Day valley, Oregon. In Canada it was first recorded 

 from the Souris river, Saskatchewan ; at a later date from Calgary, Alberta, and finally from 

 Porcupine creek and Grreat valley, Saskatchewan. All of these localites are recognized as 

 belonging to the Lignite Tertiary. 



Platanus raynolddi, Newb. 



Bib : Trans. R.S.C., III, 1885 : IV, 1886 : Lat. Ex. FL, 1868, 69 :. Tert. Fl., 1878, 185. 



The distribution of this species is very similar to the last. In the United States it is 

 found in the Fort Union group of Montana ; the Denver group of Golden, Colorado, and 

 the Miocene of the John Day valley, Oregon. The Canadian distribution is less extensive, 

 but it has been obtained from the Lignite Tertiary ot Porcupine creek, Saskatchewan, and of 

 Calgary, Alberta. 



Podocar piles tyrrellii, Dn. 



Bib : Trans. R.S.C., V, 1887, iv. 35. 



The only record of this species is contained in an account of the Laramie formation in 

 1887. This specimen was obtained, from Vermilion river, of the Belly River series, and the 

 comment is made that while the genus is known to the Eocene of Europe, it does not appear 

 on this continent higher than the Cretaceous. 



Populus sp. 

 Bib : Geol. Surv. Can., 1871-72, 59. 



A branch of a tree from Quilchena has the general aspect of a poplar, and it may be- the 

 same as leaves and wood referred to by Sir WiUiam Dawson as derived from the Quesnel 

 river in 1871. 



Populus acerifolia, Newb. 



Bib : Lat. Ex. Fl., XXXV, 37 pi. XXVIII, f. 5-8 : Cret. and Tert. Fl., 1878 : Trans R.S.C., 

 IV, 1886, iv, 27; III, 1885 : Geol. Surv. Can., 1887, 136E. 



Lesquereux has recorded Populus acerifolia from the Fort Union group of the Yellow- 

 stone river, Montana, and Fort Union, Dakota, which appear to be the only localities in the 

 United States so far noted. In Canada it seems to have been a widely distributed species in 

 Tertiary time, since it has appeared in nearly all collections and from a large number of 

 localities. It was first noted as occurring in the Tertiary of Calgary, Alberta, in 1885. In 

 the following year Sir William Dawson observed it in the Lignite Tertiary of Porcupine creek 

 and Great valley, and in 1887 it was obtained from the Red Deer river. In 1906, 

 Lambe secured it from Quilchena, Coal gully, and both the Tranquille and Horsefly rivers, a 

 distribution which seems to imply tji^t it was a species common to the entire Tertiary area. 



