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Golgi impregnations showing the olfactory afferents invading the subunits. (A–C) Two different patterns of subunit innervation (see text), arrowheads on (B) mark numerous swellings. (D) Olfactory receptor endings, width of cluster on the left corresponds to the cap of the subunit. (E) Fine structure of olfactory afferents invading the subunits. (F) A single round-shaped subunit found in the antennular lobe (marked with arrowhead). AV, arterial vessel. Scale bars: 100 μm.
