抄録
As regards the secretory activity of the cells of the preoptic nucleus in the toad, Bufo vulgaris formosus BOULENGER, two separate modes of cytoplasmicsecretion are distinguishable, which are responsible for production of different kinds of secretory material respectively. One of the secretory behaviors is concerned with elaboration of fine granules with predominant affinity to anilin blue component of Mallory's triple stain, which apparently represents the product of neurosecretion widely known with the hypothalamic nuclei in various groups of vertebrates. In addition to such secretory material, another kind of colloid material in the form of large or small spherules takes its origin in the cytoplasm of the neurosecretory cells in question, which stains pronouncedly with either acid fuchsin or Orange G in Mallory's staining and is expelled directly to the extracellular space. Alternative staining of the same sections consecutively with Mallory's stain, Heidenhain's iron hematoxylin and Gomori's chrome alum hematoxylin has demonstrated that the materials in question are decicedly distinguishable from each other in that only the spherule colloid stains with iron hematoxylin.
