The article deals with the issue of correlation of the perceptual and the rational in language. Perception of both oral and written speech is based on the sensory perception of the rhythmic picture of this or that speech extract. The authors assume that the rhythm is of the primary importance for speech perception. The research results may be used as the foundation for elaboration of foreign language teaching methods that take into consideration the system correlation of the perceptual and the rational.

There is revealed the structure and the peculiarities of the periphery of the lexical and semantic field Fishery in the Don Cossack dialects. There is considered and analyzed the utmost zone of the fields periphery represented by stable comparisons.

There is considered the lexical and semantic field Fishery in Don Cossack dialect, which is the totality of lexical units united by the common semantic component (fishery). There are shown the basic signs of the given field, based on its structural components.