Fig. 7. Light micrograph of a longitudinal section through the interfollicular stalk separating T-1 (top) and T follicle (bottom). The ovariole sheath is still intact. The three positions measured along the stalk are shown as red dots, from anterior (top) to posterior (bottom). Two groups of cells are present near the posterior stalk position: the stalk cells which are not dye-coupled to either adjacent follicle (a), and follicle cells which are coupled to the T oocyte (b). Semi-thin section stained with 1% Toluidine Blue in 1% Borax. Scale bar, 20 µm.