ABSTRACT
In a previous communication (Yao, 1945(a)) it has been shown that only the material of the hypostome, when used as implant, has the properties of an organizer; such a graft is able to induce a new hydranth, in which the hypostome is developed from the implant itself, while the rest, including tentacles and body proper, is derived from the host. Supposing the induction process to be evoked by some active substance present in the organizer, this active substance, as well as the initial act of induction, might be modified by those agents which inhibit or stimulate respiration. The present paper deals with the effect of certain respiratory inhibiting and stimulating agents on the induction ability of the hypostome. The effect of oxygen deficiency on induction will also be described.
The details of the method used will not be described, since these were essentially similar to those given in the former paper.
