1 



2 



3 



4-6 



7-10 



11 



Figure 331.— Spleen of chick 35 days after hatching. 1,370 X. 



12-14 Naked thrombocyte nuclei. 



Early immature plasmaoyte. 

 Late immature plasraacyte. 

 Immature lymphocyte. 

 Mature lymphocytes, medium size. 

 Mature lymphocytes, small size. 

 Naked lymphocyte nucleus. 



15 Mature heterophil. 



16 Possibly a monoblast or early immature monocyte 

 17, 18 Early immature monocytes. 



19 Late immature monocyte. 



163 



