In 1908, Freud in his 'Character and Anal Erotism' drew attention to the impulses included under the description analerotic, and to their great significance in the development of the Ego factor of the personality; since then the limits of this theme have been extended ever further in the steadily accumulating investigations of many authors, and its fundamental importance made manifest. Such work could apparently only be carried through in the teeth of manifold resistances, on the part not only of the outsider but also of the student of analysis himself, because the psychic constellations concerned are subject to the most diverse transformations; for similar reasons wherever they are found, the solution of the most outstanding problems of the psycho-analytic treatment is concerned. It will suffice only to allude to the results, for they are intimately bound up with the progress of psycho-analysis in the last decade, and are consequently well known. Despite the fertility and wide ramifications embraced in the relevant literature published hitherto, it is