Abstract: | The olfactory lamellae of the catfish H. fossilis (Bl.) was studied in the scanning electron microscope. The olfactory lamellae are composed of sensory and non-sensory epithelium. The sensory epithelium contains large numbers of ciliated receptor cells, whereas the non-sensory raphe epithelium is covered with a dense mat of non-sensory cilia. It is not known whether the olfactory cilia possess receptor sites. |