Rabl, Metatnerism of the Vertebrate Head. 



155 



Metaotic metameis. 



Prootic Metamers. 



Hind gil 

 region. 



Primitive hind- 

 head region. 



Fore-head. 





EL p ^ 





c:; Ui 3 



re crq & ^ 

 3 S 3 ^ 



P- '~^ 



Hii; H 



■(i-S 5i 



n> 3' 



— " 3-. :;. 



P 3 ^-- 5 



3 -" -1 S. 



n O m p 



O •-► — , 



— m 



? - ;^ -TT 



^> 



O ^- re 



<;P'— ^,1 :r-nPO" 



S. g. ^-, ^ 



2_ n> 

 p Cfq 



2- 2. 





»- °. 



cr p 



S II 



-1 h^ 



0-, n> 



ni cy 





^:^ 



^ 





