DICUSSION: Dr. Leo Stone agreed with various points in Dr. Peto's presentation, particularly his emphasis on the role of the mouth in the genesis of archaic depressive affect, as well as the importance of aggression. But he questioned how the mouth representation can originate and direct hostile impulses toward the hand representation without invoking the mediation of a central, inclusive, and initiatory agency of the central nervous system, a rudimentary precursor of the ego and self. He suggested that the essential reactions of frustration and gratification are holistic and coenesthetic: it is not the mouth that goes to sleep or is restless, but the whole baby; a conception of part against part (except in the