PHYLOGENY 



29 



Teleosrei 



Lepidosteoidei 



Amioidei 



Chondrosrei 



Holostei 



Polyprerini 

 Actinoprerrygii Coeiacanrhini 



Osreolepidori 



Seiachii 



Teleosromi 



Holocephali \ ? Coccosreomorphi 



m \ Dipnoi 



Pleuracanmodii > 



Elasmobranchii \ Cladoselachii 



Acanfhodii 



y 





.' I 



Chondrichthyes 



Pelromyzonria 

 Myxinoidea 



\ 



Cyclostomara 



OsreichrKyes 



Pisces 



Gnarhosromata 



Craniata 



DIAGRAM I. PHYLOGENY OF THE VERTEIJUATA CUAXIATA. 

 The Ostracodermi have been omitted from this diagram. 



