student who becomes disturbed by an anxiety neurosis while preparing for his final state examination. I find that here, as there, the effect is not explained by the reported etiology. One must not necessarily “overwork” himself studying, and a healthy mother is wont to react to the death of her child with normal grief. But, above all, I would expect that the overworked student would acquire a cephalasthenia, and the mother in our example a hysteria. That both became afflicted with anxiety neurosis causes me to attach importance to the fact that the mother lived for eight year in marital coitus interruptus, and that the student entertained for three years a warm love affair with a “respectable” girl whom he was not allowed to impregnate. These examples tend to show that where the specific sexual injury of the coitus interruptus is in itself unable to provoke an anxiety neurosis it at least predisposes to its acquisition. The anxiety neurosis then comes to light as soon as the effect of another banal injury enters into the latent effect of the specific moment. The former can quantitatively substitute the specific moment but not supplant it qualitatively. The specific moment always remains that which determines the form of neurosis. I hope to be able to prove to a greater extent this proposition for the etiology of the neurosis. Furthermore, the last discussions contain the, not in itself, improbable assumption that a sexual injury like coitus interruptus asserts itself through summation. The time required before the effect of this summation becomes visible depends upon the predisposition of the individual and the former burdening of his nervous system. The individuals who bear coitus interruptus manifestly without disadvantage really become predisposed by it to the disturbance—anxiety neurosis—which can at any time burst forth spontaneously or after a banal, otherwise inadequate, trauma, just as the chronic alcoholic finally develops a cirrhosis or another disease by summation, or under the influence of a fever he merges into a delirium. III. ADDENDA TO THE THEORY OF ANXIETY NEUROSIS. The following discussions claim nothing but the value of a first tentative experiment, which judgment should not influence the acceptance of the facts mentioned above. The estimation of this “Theory of Anxiety Neurosis” is rendered still more difficult by the fact that it merely corresponds to a fragment of a more comprehensive representation of the neuroses.