Abstract
Summary α-MSH, β-MSH and ACTH bave been localized in the cells of hypophyseal intermediate lobe by fluoresence histoimmunological technics. Elaboration and excretion of these polypeptides are enhanced after dehydration or adrenalectomy. The most evident variations are seen with α-MSH and ACTH after dehydration, with β-MSH after adrenalectomy.