EGG CORTEX IN MORPHOGENESIS
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FIG. 9. Vertical sections of : (a) a normal egg with the grey crescent (at the right side)
(α') detail of the vitelline wall; (b) an egg with a Born's crescent (also at the right side);
(&') detail of the vitelline wall. The structure of the dorsal side (α' and 6') is in both cases
foe same, but very different at the ventral side (left).