402 



PALAEOZOIC TIME. 





SILURIAN. 



DEV. |cARB. 







lower. upper. 







p. Pd. 





S. C. P 







!. L 



I 1 









Phillipsia, Griffithides 



Fhyllopods 













Cyclops Tribe (Eurypterus, etc.) 



i i 





— ! ~ml 





Isopods 



Amphipods 



j I 







1 i 



f I 



1 \ 



1 1 





""1 7™ 



:,:: 



Schizopnds 







• ! 



f i 



i ! 









Brachyurans 



Myriapods 





Spiders : Scorpions 



Insects 



I>- \ 



S i 



1 f 





-*-m 





Beetles 



j 1 









Lepidopters, Dipters, Hymenopters, etc. 



\ i 



j {. 





i i 





VERTEBRATES. 



t i 



i i 



• i 



• i 



r ! 



_.„..=. ! 









Ganoids 





Selachians 









Cestracionts 



— r t 



! 1 



• i 



: f 

 ■ 1 



; 1 





.._ 









! 



Reptiles 









! 1 



v ■<■ 



: I 

 ■ I 







.... 



Ordinary 



Labryinthodonts 





True Reptiles 











j - } 



; i 









Enaliosaurs 







Crocodilians 



! 









Birds: Mammals > 



'■ i 



I 















