Abstract
THE structure of the sensory endings of the vomero-nasal organ of vertebrates (Jacobson's organ) has been the subject of some controversy in past years1–3. Although the receptor cells seem to resemble closely those of the olfactory epithelium, the presence of cilia on their free ends is arguable. The problem has not yet been investigated by electron microscopy, and it is of interest to report the fine structure of these endings in a reptile, Anguis fragilis, where the vomero-nasal organ is particularly well developed.
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