I will now consider a group of cases, in whom the degenerative soil is so prominent that they have been properly called "Psychoses of Degeneracy." They should, however, be considered here, because the various psychotic manifestations of these individuals are purely psychogenetic in nature, and evoked by a certain milieu in which the individual was placed. As my material is derived from the criminal department of the Government Hospital for the Insane, the causative factor in these cases will again be found to be imprisonment. These cases differ from the so-called acute prison-psychotic-complex in that the etiologic factor does not consist in a single emotional experience. We are not dealing here with patients in whom the commission of a crime is an accidental occurrence in their life, that is, still uncorrupted individuals upon whom the criminal act in itself might act in a deleterious manner. The patients belonging to this group are, as a rule, old offenders, who have long been hardened to crime, and whose entire life is an uninterrupted chain of conflicts with the law. To this group also belong those high-strung individuals with early antisocial tendencies, who from childhood show a marked degree of egotism and self-love; who are very vindictive and revengeful in their reaction to frictions in social life. Upon falling into the hands of the law, they are incapable of adjustment to the new situation, react in an insane and wild manner to the prison routine, and, in consequence, frequently commit grave offenses during imprisonment. We owe our present knowledge of the psychopathology of these individuals to the excellent work of the followers of the great Magnan, who contributed so richly to the study of degeneracy.