Figure 3: Figure 3: Microscopic appearance of the different gonadal developmental satges of female O. senex senex. A: Immature; B: Vitellogenesis Stage I (developing); C: Vitellogenesis Stage II (mature); D: Vitellogenesis Stage III (ripe); E: Spent. N: Nucleus; FC: Follicle Cell; PVO: Previtellogenic Oocyte; VO: Vitellogenic Oocyte; LVO: Late Vitellogenic Oocyte; G: Germanium; OW: Ovarian Wall; YGL: Yolk Globule; PY: Protein Yolk..