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Figure 2


Fig. 2. Appearance of the different types of secretory granules after stimulation of cyprids with dopamine (1 mmol l–1) for 10 min. Cyprids were aldehyde fixed, sectioned and stained with Toluidine Blue. The different types of granules are labelled (1–4). The cement duct, with dissolved proteins, is seen as an extension away from the cement gland towards the muscular sac.