such cases, with the utmost variety and the strangest commingling, based upon hereditary degenerative processes, and accompanied by moral imbecility in its most perverse manifestations. * * *. Frequently, in hysterical subjects, the sexual life is morbidly excitable. This excitement may be intermittent (? menstrual). Shameless prostitution may result, even in married women. In cases of a milder type, the sexual impulse is exhibited in the form of onanism, nude perambulations about the room, wearing of male attire, etc. In cases of hysterical mental disorder, the morbidly excited sexual life may manifest itself in the form of maniacal jealousy, baseless complaints against men of indecent assault, hallucinations of coitus, etc. Sometimes there may be frigidity, with lack of sexual pleasure, commonly due to genital anæsthesia.” Incest in women, dependent upon psychopathic causes, is also alluded to by _von Krafft-Ebing_; it occurs in those in whom a partial imbecility that leaves the sense of modesty undeveloped is combined with eroticism. Thus, a case reported by _Schürmayer_ is mentioned, in which a mother had, or attempted, intercourse with her son, aged five and one-half years; and again a case reported by _Lafarque_, in which a girl of seventeen laid her thirteen-year-old brother on herself for the gratification _conjunctionis membrorum_, while simultaneously masturbating her brother; _Magnan’s_ case, an unmarried woman twenty-nine years of age, who could hardly resist the impulse toward copulation with her nephews as long as they were quite young; _Legrand’s_ cases, in one of which a girl fifteen years of age seduced her brother to the performance of all possible sexual excesses on her body; another, a married woman aged thirty-five, who committed incest with her eighteen-year-old brother; and a third, a mother aged thirty-nine, who committed incest with her son.