[Morphology of the telencephalon of Salmo irideus (Teleostei). Golgi-impregnation study]

The telencephalon of Salmo irideus (Gibbons) was investigated by means of staining and silver impregnation techniques. It shows the fundamental plan characteristic for teleost species. The neurons in the various telencephalic nuclear areas are, in part, quite different with respect to their density of arrangement,migratory behavior, width of pericaryon and number of spines, inclusively. Neurons exhibiting a high degree of morphological differentiation (i.e. neurons of the stellate and pyramidal like type of differentiation) are located in the area dorsalis telencephali only. This telencephalic region is considered to be a functional homologon of limbic telencephalic structures of other vertebrates.