PLATE 3 



E:?vPLANATrON OF FIGURES 



8 Rabbit, age forty-four days. Erythroblastic cells in close association with 

 a small blood vessel in the region of Peyer's patch. Photo X 750. 



9 Rabbit, age forty-four days. Mononuclear eosinophiles in the tunica 

 propria of the caecum near its junction with the ileum. Early developmental 

 stages in their formation are seen. Photo X 750. 



10 Rabbit, age twenty-one days. Mononuclear and binuclear eosinophiles 

 in the tunica propria, directly underneath the epithelium, in the region of the 

 appendix. In some cells the eosinophilic granules are so densely massed as to 

 make the cytoplasm appear in the photograph as almost homogeneous. Photo 

 X 750. 



11 Rabbit, age twenty-one days. Eosinophiles in the tunica propria and 

 in among the epithelial cells in the region of the appendix. Photo X 750. 



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