Abstract
The structural organization of the olfactory epithelium in Sperata aor was studied by light as well as scanning electron microscopy. The elongated olfactory organ comprised of 52-54 primary lamellae assorted on both sides of narrow median raphe. The middle dorsal part of the olfactory lamellae was characterised with linguiform processes. Sensory and non-sensory areas were distributed separately on each olfactory lamella. The sensory epithelium occupied in the middle linguiform process, whereas the basal part of lamellae was covered with non-sensory epithelium. The sensory epithelium was composed of morphologically distinct two types of receptor neurons either ciliated or microvillous. The non-sensory epithelium contained mucous cells and supporting cells with inconspicuous microridges. The orientation of different cells lining the olfactory epithelium was discussed in light of their functional significance.
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