Phosphagen in the Electrical Organ of Torpedo

1. The electrical organs of Torpedo marmorata contain creatine phosphoric acid, which was identified by the velocity constants of its hydrolysis under controlled conditions. 2. This compound is of functional importance in the organ, being diminished in amount by activity, heat rigor, and by conditions which are unfavourable to the organism as a whole. 3. The physiological parallel between the electrical organ and muscle appears, as far as this study has been carried, to be itself paralleled by the chemical mechanisms. 4. Creatine has been isolated from the electrical organ and has been identified, in confirmation of the earlier work of other authors.