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268 Scientific Intelligence. 
wick; (5.) The Land Animals of the Carboniferous and Devonian 
periods, of which Acadia has afforded so many examples; (6,) 
ities i Auriferous i 
all interested in geological discussions will find it valuable read- 
; : pay: 
2 
several of new carboniferous reptiles ( 
insects, and air breathing mollusks ; a large variety of coa ee: 
both of the Devonian and Carboniferous, many 0 them nov 
forms, besides various species illustrating the Post-pliocene em 
and the life of other periods. 
Subaérial Denudation, and on Cliffs and Exscarpmenis 
a ae 
Onn: 4 
of the Chalk and the Lower Tertiary Beds, ag ae Wartanas 
8vo. (From the Geologica 
, etc., have been the agents in ¢ ro 
We a@ great amount of denudation. The solid matter 0 
ealden Beds must have existed somewhere before, an 
hav e been worn away than was deposited afterward by _— He: 
for much would be carried out to sea to form a marine 
Of course fresh-water beds are both less common and tht ig 
marine beds, but so also, as aforesaid, the comparativel far less 
county 
and carried off therefrom a sisaot thickness of pee bare 
; proportion that the effects of marine denu ps ‘hat 
and that there may have been 4 far wr ori 
other words, that the agents in question were far more ved has 
t they now are in these islands. Great change 
