Left side 



The pronephros of Chrysemys marginata. 



Embryo F. 

 1,30 



19 



III 

 IV 



V 



VI 



VII 



VIII 



IX 



X 



XI 

 XII 



r 1,45 



2,15 



2,30 



2,45 



3.15 



3,30 



3,45 



4.15 



4,.30 



Right side 



I ear 



}« 

 }iii 



}v 



{■ VII 

 I VIII 



lix 



X 



XI 

 XII 



4.45 



5,13 



(Scale = 3 sections to 

 a division) 



5,30 



|neurenteric 

 I canal 



6,6 



2* 



