Figure 2. Three early vitellogenic follicle from an ovariole such as that in figure 1. Oocytes are opaque due to light scattering by yolk particles and yellow due to the carotenoid conjugates of lipophorin, the second most abundant yolk protein in this species. Nurse cells form a cap on the anterior surface of the oocyte. The translucent layer surrounding the oocyte is the 50 μm thick epithelium of follicle cells