[Distribution of monoamines in the hypothalamus and hypophysis of carp, Cyprinus carpio].

Monoaminergic fibres exhibiting green fluorescence have been revealed by the Falck histochemical fluorescence technique in the area of the hypothalamic preoptic nuclei and nucleus lateralis tuberis of the carp. Monoaminergic cerebrospinal fluid-contacting nerve cells with an intensive greenish and yellowish fluorescence were observed in the walls of the lateral and posterior recesses of the third ventricle. Monoaminergic fibres are few in the pro-and meta-adenohypophysis. Yellowish-green fluorescent fibres seem to be much more frequent in the meta-adenohypophysis. Fluorescence of the fibres is unstabel and of a weak intensity.