Evolution 



Modern 

 Diluvium 



Pliocene 

 Miocene 

 O!igocene . 

 Eocene 



Cretaceous . 



Jurassic 



; Triassic 



Permian 

 I 



Carboniferous 



I 



Devonian . 



Silurian 



Cambrian . 

 Laurentian . 



Higher JH annuals 



| Birds 



} Marsupials 



Monotremcs 



REPTILES 



Secondary or 

 Mesozoic, 

 ii oer cent. 



Reptiles 

 Amphibians 

 Lung fishes 

 Lower fishes 



1 



AMPHIBIANS 



FISHES 



Archaen, 54 

 per cent. 



FIG. 2. Table showing the chronological succession of the stratified rocks, the sub- 

 division of geological time, the approximate position of the earliest fossils of 

 each of the main types of vertebrates, and the period of domination of each 

 group. 



Primary or 

 Palaeozoic, 

 32 per cent. 



