CHAPTER V 



THE CONQUEST OF THE DRY 

 LAND 



Tell-tale Evidences of Marine Ancestry Origin of Land Plants 

 The Three Great Invasions of the Dry Land New Ways 

 of Breathing Changes in Movements New Ways of 

 Looking after the Young New Kinds of Protection 

 Betwixt-and-Between Animals Haunts within Haunts 

 Beneath the Ground Cave Animals Arboreal Life. 



OVER and over again in the history of 

 animal life some adventurous members 

 of aquatic races have become colonists of the 

 dry land. Perhaps we should not be quite 

 wrong if we said, a little fancifully, that one of 

 the great unspoken wishes of animals was to 

 get out of the water. In any case, it is almost 

 certain that the great majority of the different 

 classes of land animals had their ancestry in 

 the sea, some of them making the transition 

 which might require millions of years through 

 fresh waters. 



We must be careful here to see the facts 



clearly. Land mammals had their origin in 



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