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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.