The pronephros of Chrysemys marginata. 35 



j 4,29—4,38 — tubules with opening into nephrotome and into 

 ^ [ duct at 4,33 and 4,38 respectively. 



Pronephric duct fuses with gut at 8,32. 



Embryo M. 



Stained with Boraxcarmine 72 hours. Mounted upon 9 slides 

 each with 39 sections. 



Body begins 1,4. 

 Left side of embryo Right side of embryo 



3* 



