[Morphofunctional regularities of evolution of the neuro-electric apparatus in fishes]

Generalization of the literature data makes it possible to consider evolution of the fish neuro-electrical apparatus from the point of view of morphological (morphofunctional) regularities formulated by A. N. Severtsov (1937). Besides, an attempt is made to present the evolutional formation of the electrical apparatus as a regular process developing on the basis of a general property of protoplasm to produce bioelectricity.