150 



CHIM^SROID FISHES AND THEIR DEVELOPMENT. 



RECENT Rbinochi macro, ffarriolta, Ca/lorhyncbus Chimacra 



JURASSIC 



.Sharks 



TR1ASSIC 



\ 



\\ 

 \\ 



PERMIAN 



Menaspis 



CARBONIFEROUS 



\ \ 



N N 

 Rhynchodus \ N \ 



Palcpomylus^ ^ \ \ 



DEVONIAN 



Ptyctodus 



Fig. 144. Phylogeny of the Chimseroids. Arrangement according to palcontological data. 



