Abstract
By the injection of glutamylcholine into fertilized hen's eggs, the following results were obtained. In the general development of the chick embryo any tendency of promotion was not observed. No influence was observed on the amount of the allantoic fluid in the early stage of the incubation, while in the late stage the excretion of the allantoic fluid was inhibited slightly. A considerable change in nitrogen content cccured in the allantoic fluid.