46 
Don valley deposits indicate a temperate climate. The two 
int, Mr. B indly replied, under date of December 17, 
1913, as follows: “Dr ofield states that there is no evidence 
except that of the plants bearing on the climatic conditions at 
that time in the y Valley. No correlation either struc- 
of the Don Valley, Ontario, and those of the Kootenay Valley, 
B.C.” 
. Dawson, D. P. Penhallow, and other Canadian geologists, 
in their investigations of the biologic features of t! leistocene 
deposits of Canada,® rae three distinct aieate periods: 
3. Green’s Creek: Mild. t the equivalent of that of the 
northern United States at ae present time. 
2. eis Cold. About the equivalent of that of Labrador 
e present time. 
I oe Warm te: te. About the Sue of that of the 
all are Hine with one seid (Acer euneras Penh.), and 
all have a one exception 
(Quercus Gblonwafola The, confined to ee The species 
of greatest southern range, which may be regarded as indicating 
warm-temperate conditions in connection with the Don flora 
re sphaeroidea Spach. (= C. thyoides (L.) B.S. P.). 
Mississippi to Massachusetts. 
Juniperus virginiana L. West Indies and Arizona to New 
runswic 
salle! obtusiloba Michx. (= Q. minor (Marsh.) ae Texas 
Mi ate: 
r 
None of these, however, as may be seen from their eae 
ranges of distribution, is a strictly southern species and non 
® Rep. British Assn. Adv. Sci., Sec. C, Bradford 1900: 328-329. i901. 
