Field -Pronephros in Amphibia. 



PL. VI. 



4.9. 



mb.ha 



rrrln 



fjxsntf Inpi'fon. 



tblnph'stm' 



.s/ni hi 



.50 



rod" 



pi ion 



frn.do 

 ''fbljipliMn,' 



irisrhr 



lapi'lon 



Uhtt 



en'th. 



tbl.nph'sbnf 



.cd:Spt. 



Inpi'ton. 



RH.F.de! 



B.Meise!,!iA3ostor.. 



