46 
HAROLD’S DISCUSSIONS. 
following age—that is, one age foreshadows what is 
coining in the next. 
Fossils of insects are rather common; some of 
them were of large size. The species which live on 
the nectar of flowering plants could not have existed 
then. Such insects and flowering plants seem to have 
developed side by side through the later ages. 
Thus we see that in the third chapter of the earth- 
book, whose rocks we have called formation Number 
3, the business of making limestone continued, and 
the battle of life was still confined to the seas. This 
age closed, as did the previous one, with the upheaval 
of considerable land, increasing the areas of the con¬ 
tinents, and followed by a period of rest. 
