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Fig. 6. Electron micrographs of the apical region of posterior gill epithelial cells of the shore crab Carcinus maenas. AM, apical membrane; Bl, basal lamina; BM, basolateral membrane; CP, clathrin-coated pit; Cu, cuticle; Go, Golgi apparatus; M, mitochondria; Mt, microtubules; rER, rough endoplasmic reticulum; sCu, subcuticular space; V, vesicle. Scale bars, 1 µm (A); 0.5 µm (B,C).