Pond Life 
The water-lilies, with large floating 
leaves and big white or yellow flowers, 
are the most beautiful of all the pond 
plants, and make a splendid ornament to 
many a beautiful piece of water. Moor- 
hens and  dabchicks, wagtails and 
dragon-flies love to play about the leaves 
and sport in the bright sunshine. But 
long before any of these present-day 
plants made their appearance, many 
changes had to be gone through. Not 
only has the distribution of sea and land 
been greatly altered, but the climate 
itself has gone through change after 
change. And other forms of life—such 
as the strange and terrible reptiles, 
which swam in the early seas and even 
flew about in the air on huge wings, 
bigger by far than any of the largest 
birds now living, had their time on the 
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