THE EVOLUTION OF THE FLOWERS 8i 



and it has beautifully preserved insects of three 

 million years ago for us to examine. 



In other cases myriads of insects have fallen into 

 the mud at the bottom of lakes, and been preserved. 

 In some cases myriads have been buried in the fine 

 ash of a volcano. We have countless specimens, and 

 they help us to restore the scene after the reptiles 

 had gone. It now had large numbers of our familiar 

 trees and flowering plants. It began to have grass 

 on its plains. It had bees and wasps and butterflies 

 going from flower to flower. Next we have to bring 

 the birds on the scene, and then we will introduce 

 our familiar mammals and man. 



6 



