The pronephros of Chrysemys marginata. 



23 



Left side 



I 



II 

 III 



IV 



VI 

 VII 



VIII 



IX 



X 



XI 



XII 



XIII 



Embryo H. 

 1,47 



2,15 



Eight side 



ai 



2,30 

 2,45 

 3,15 

 3,30 

 3,45 

 4,15 

 4,30 

 4,45 

 5,12 



}i 



II 



III 



IV 



)vi 



\ VII 



VIII 



IX 



X 



XI 



XII 

 XIII 



5,27 



5,42 



neurenteric ) 

 canal 1 6,13 



(Scale = 3 sections to 

 a division) 



