Summary.The reaction of the glantlular cells in the submaxillary and sub‐lingual glands of the rat has been cytologically investigated on indirect stimulation, before and after partial sympathetic or parasympathetic denervation. A clear explanation of the results obtained could be presented on the basis of neuro‐secretory units in these glands. On the other hand a diffusion of the chemical mediators according to the view of Cannon and Rosenblueth seems not to have any significant importance for the innervation. Thus the present results support the conception concerning the functional organization of the peripheral autonomic nervous system advanced in a previous pa