CELLULAR ELEMENTS OF THE MAMMALLVX EMBRYO 



V. E. EM MEL 



f d 



Pern 



P c ni 



14 



K'\ 



§ 



P> 







^f^^- 



. # 





Pci; 



/^S^.,^ 



/,9 



Pcy 



vs> 



e- 



16 



17 



119 



