Figure 225. — Blood from dorsal aorta of early chick embryo. 



1,370X. 



Incubation age, 2 days 17 hours. 



1-11 



12-19 



20 



21 



22 



Early polychromatic primary erythrocytes. 23 



Mid-polychromatic primary erythrocytes. 24 



Mitotic telephase of early polychromatic primary 25 

 erythrocyte. 26 



Mitotic metaphase of early or mid-polychromatic 27 

 primary erythrocyte. 



Mitotic telephase of early or mid-polychromatic 

 primary erythrocyte. 



A mid-polychromatic primary erythroplastid. 



Large embryonic thrombocyte. 



Embryonic thromboblast. 



Medium embryonic thrombocyte. 



A group of 4 small embryonic thrombocytes clumped 



together but fi.xed before disintegration set in. 



96 



