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THE CHAIN OF LIFE. 



Fig. i^g.—SteUiosaurus lotigicostatiis (Fritscli). Upper Coal-formation of Bohemia. 



The Labyrinthodonts of the Carboniferous continue upward 

 into the Permian, where they meet with the true reptiles ; and 

 in the earlier Mesozoic some of the largest and most typical 



