Field. -Pronephros in Amphibia. 



Jiu/fiiri 



fn.crff. 



• J4 



PL.VII. 



/ I i 



mylm...j./. 



"'-'■ pi 'Ion 



mshhvj. -I A 



//# 



mvlin 



I'drm . 



cmsprhph. 



ec'drin 



-=r^ 





rdspi. 



\..ncd. 

 ''_ en'drni 



■fo'/diJ 



pcdrm 



56- 

 muspi-'nph 



so'plit 

 ■ipl'plii 



A' 



MCd 



HJI F. del 



. B-Meisel.Iidi.Bosion 



