a portion of which is familiar to us as attention. We must also steer clear of the distinctions superconscious and subconscious which have found so much favor in the more recent literature on the psychoneuroses, for just such a distinction seems to emphasize the equivalence of the psychic and the conscious. What part now remains in our description of the once all-powerful and all-overshadowing consciousness? None other than that of a sensory organ for the perception of psychic qualities. According to the fundamental idea of schematic undertaking we can conceive the conscious perception only as the particular activity of an independent system for which the abbreviated designation "Cons." commends itself. This system we conceive to be similar in its mechanical characteristics to the perception system P, hence excitable by qualities and incapable of retaining the trace of changes, _i.e._ it is devoid of memory. The psychic apparatus which, with the sensory organs of the P-system, is turned to the outer world, is itself the outer world for the sensory organ of Cons.; the teleological justification of which rests on this relationship. We are here once more confronted with the principle of the succession of instances which seems to dominate the structure of the apparatus. The material under excitement flows to the Cons, sensory organ from two sides, firstly from the P-system whose excitement, qualitatively determined, probably experiences a new elaboration until it comes to conscious perception; and, secondly, from the interior of the apparatus itself, the quantitative processes of which are perceived as a qualitative series of pleasure and pain as soon as they have undergone certain changes.