The structure of the olfactory and respiratory epithelia of the snake was studied using the rapid Golgi and the Nissl methods. The olfactory epithelium was a pseudostratified columnar one and was composed of supporting, olfactory and basal cells which were columnar, bipolar spindle and triangular, respectively. The nuclei of these three types of cells were arranged in a laminar pattern: those of the supporting cells were located most superficially, those of the olfactory cells occupied the middle wide zone, while those of the basal cells were arranged in a row at the base of the epithelium. The respiratory epithelium was a ciliated pseudostratified columnar one and was made up of columnar, mucous and basal cells which were cylindrical, goblet-like and triangular, respectively. Thus, the fundamental organization of the olfactory and respiratory epithelia in the snake was similar to that of the olfactory and and respiratory epithelia in various other terrestrial animals.