252 



/. L. Jona: 



APPENDIX C. 



From Parker and Haswell (6) and the Cambridge Natural 

 History, Vol. VII., ed. by S. F. Harmer and A. E. Shipley, 

 and Ortinann (8). 



Eozoic 



Archean 



r ® § ( Cambrian 

 Silurian 



:^ -E I uo 



Devonian 

 Carboniferous 



LO p^ (. Permian 



Elasmobranch 



Elasmobranch 



Holocepheli Chondrostei Dipnoi Amphibia 

 Dipnoi 

 Holostei Eeptiles 



fTi'iassic Mammals 



j Uj^per Triassic 



Mesozoic j Jiirassic Mammals Birds 



Secondary *] Cretaceous Crab 



I Upper Creta- Fresh- water 



(^ ceous Crab 



Holstei 



Holstei 



f Eocene 

 Oliffocene 



LAINOZOIC ^i j^.«^^^^ 



Tertiary 



Whales 

 Whales 



I Pliocene 



l^ Postpliocene 



Teleost 

 Teleost 



Teleost 



Genealogical Table 

 [according to Parker and Haswell). 



Mammalia Aves 



Keptilia 



I 



Amplubia 



Toleostomi 



I 



Dipnoi 



Existing 

 ' Elasmo- 



Holocephala branchii 



I I 



Primitive Elasmobranchii 



