



Figure 226. — Blood from heart of chick embryo. Incubation age, 4 days 12 hours. 1,370X. 



1-2 Mid-polychromatic primary erythrocytes. 

 3-9 Late polychromatic primary erythrocytes. 

 10-12 Late polychromatic erythrocytes showing early 

 stages of cytosomal fracturing, an artifact. 

 13 Late polychromatic primary erythrocyte near the 

 metaphase stage. 



14 Late polychromatic primary erythrocyte in the 

 late telephase stage. 

 15-16 Smudged primary erythrocytes. 



17 An erythroblast of later embryonic generation, or 

 an embryonic tliromboblast. 



18 A medium embryonic thrombocyte. 



19 A small embryonic thrombocyte. 



98 



