238 REVIEWS. 
an intermediate continent. ‘‘If this inference should be confirmed by 
ture observations, we should then see how the eocene tropical or sub- 
tropical flora of Europe was crowded off the stage by the tropical flora 
east, and now represented by the living Indo-Australian flora, 
characterized ee its Hakee, Dryandree, Eucalypti, etc., etc., which form 
echa onspicuous an element in the eocene flora of Europe." Instances in 
s land connection must have occurred to the northward, and that the 
country was then in possession of a milder climate than now reigns in 
the same latitude. 
In discussing the causes which produced this difference of climate 
Professor Newberry gives his adherence to none in particular, but thinks 
that the deflection of the Gulf Stream would be the most natural method 
space. This cannot be assumed to be the cause in the present instance; 
for any ‘‘cosmical cause, producing a general elevation of temperature 
on the earth's surface, would have given us a tropical flora on the Upper 
Missouri, whereas we find in the miocene flora there, as yet no tropical 
plants." 
RELATIONS OF THE ROCKS IN THE VICINITY OF Boston.* — Professor 
Shaler regards all the Pisa gs of this vicinity as of —_— = 
and rejects the old theory of their oe origin. In this S sup- 
rted by the late discoveries of the Eozéon in this vicinity, Di a the 
Dor T 
` he ipsis ood of Quincy is described as consisting of a layer of 
m slate an 
tending to the edge of the Charles River flats in Brighton, where 
they iion pu to a sandstone. 
* Abstraet of Some Remarks on the Relations of the Rocks in the TAAR g Boston, By 
N. S. Shaler. Proc. Boston Soc, Nat. Hist., vol. xiii. Dec. 3, 1869. Pamph., pp. 
