JORDAN XII 













Visceral 



Mesoderm 







"^^ 



.♦,..' 



W^"' 



10 



11 









12 



/ 





.r. 



14 



M 





>'5 



^3 





13 





•• 





15 





Alloen&Co.LiUl. 



GERM CELLS IN CARETTA 



