IN TIME 



AMPHIBIA 



9 A 



REPTILIA 



Theromorpha 



MAMMALIA 



^ ^ 



Tl 



i i 



1 





fia 



.3 



s 1 



2 n S 



W 



Broken lines, ending in 0, indicate that the further development of 

 the respective group of animals has apparently come to a close. 



Continuous lines indicate that the group is still nourishing, or > 

 even on the increase. 



