402 



PALAEOZOIC TIME. 





SILURIAN. 



DEV. CARB. 







lower. upper. 







P. Pd. 



|s.|c.|p 





Homalonotus and Lichas 



Phillipsia, Griffithides 



■ j- -.- 









Cyclops Tribe (Eurypterus, etc.) 











I j 









Isopods 



j i 









| j 



i i 











• i j 



\ i 



j" ! 



r f 



i ! 





1 I " 





Schizopods) 



Macrourans and Anomonrans 



Brachyurans 





■H- 





Spiders : Scorpions 



:■. 



Neuropters, Orthopters 



i ! 

 I i 



i r 



! : 



j i 







::■: 



Lepidopters, Dipters, Hymenopters, etc. 





j ;'" 





VERTEBRATES. 



Fishes 



Ganoids 



■ i 



: i 



! ! 



: ■ 



| 1 









-» 





" ! | 



r f 



[ j 







... 



Cestracionts 



.... 



Hybodonts 



r I 



: l 







. 



Reptiles 



: 1 



i, i 







.._ 



Amphibians 



1 i 







"■* 



Ordinary. 



j 





.... 



Labryinthodonts 



j 1 



j 1 . 









True Reptiles 













[ ! 







■~" 



Enaliosaurs 



i - 1 









Crocodilians 



: 



{ f 





•—■j j™ 



i f 





Birds: Mammals 





