Figure 321. — Embryo bone marrow. Embryo incubated 20 days. 1,370X. 



1-6 



Granuloblasts, all at about the same stage of 



development. 



Heterophil mesomyelocytes. 



Heterophil granulocytes with one nuclear lobe. 



Mature heterophil granulocytes with more than one 



lobe. 



Eosinophil granulocytes with one nuclear lobe. 



Mature or nearly mature basophil granulocyte. 



Early polychromatic erythrocytes. 



INIid-poly chromatic erythrocyte. 



22,23 

 24,25 



26 

 27 

 28 

 29 

 30 

 31 



Mature definitive erythrocytes. 



Erythrocytes showing magenta rings and a rod of 



heterophils that fell on top of the red cell when the 



smear was made. 



Thromboblast. 



Degenerated thrombocyte. 



Lymphocyte. 



Naked nucleus. 



Smudged nucleus. 



Partially smudged primordial osteogenic cell. 



146 



