Within the field of the psychoses, longer-lasting in France than in Germany, a battle rages between the work of the old Kraepelin and that of the newcomer Bleuler. After a brief struggle Bleuler’s schizophrenias seize power in Germany while Kraepelin ventures a final sally from France with his paraphrenia group. It concerns two categories which, because of their dominant, respectively spectacular character exert a certain attraction on the dispelled concept of hysterical psychosis.