THE EVOLUTION OF MAN 



the earliest Primary period, and which are distin- 

 guished by very peculiar teeth in the roof of the 

 mouth. And the Australian Ceratodus of our 

 day has exactly the same kind of teeth. Hence, 



CERATODUS FORSTERI, 



living in Queensland, Australia. It has gills, the regular 

 breathing apparatus of fishes, but also lungs, the breathing 

 organ of adult newts, frogs, reptiles, birds, and mammals. 



we logically conclude that it has preserved this 

 peculiar double method of breathing from the 

 days of primitive creation, and we refer to it as a 

 last straggler of a real transition group from 



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