PLATE 8 



EXPLANATION OF FIGURES 



20 Granuloblastic transformation of the spleen aniage o days after stimu- 

 lation of a 6 day embryo. 



21 Leucocytic infiltration of large regions in the spleen 6 days after stimu- 

 lation of an 8 day embryo. 



22 Reaction of the spleen tissue around large necrotic accumulations of 

 granulocytic tissue. Plight days after stimulation of an 8 day embryo. 



324 



