J. Croliu— Cause of Mild Polar Climates. 148 
period wag due not so much to that peculiar distribution of 
land and water existing then, as it was to the fact that this pecu- 
liar distribution enabled the physical agents in operation during 
a high state of eccentricity to impel a vastly greater amount 
of warm intertropical water into the temperate and Arctic seas 
than they could have done under the present geographical con- 
dition of things. : 
i Not responsible. ‘The question is not were there sixteen 
Sacial epochs during the Rertinty period, but were there any ? 
b 
: Tn Support of the opinion that there is no evidence of 
glaciation during the ‘Tertiary period, Mr. Wallace quotes the 
views of Mr. Searles V. Wood, Jr., on the subject. Mr. 
