The patient is a talented artist, twenty-five years of age. She has masculine features, a deep voice, a manly gait and small mammae. Early in her youth she preferred to play with boys. She never had a liking for dolls or needlework and found no pleasure in domestic duties. At fifteen years of age she began to menstruate. At the same time she began to fall in love with young girls. Her love was only platonic in nature. She is perfectly indifferent toward men. She is bashful only toward persons of her own sex. In her lascivious dreams females are on the scene where she herself plays the man’s rôle. In another case of the same author, the patient, when a girl, had inclination for boys’ sports only. Once, when she was allowed to go to a theatrical performance, dressed as a boy, she was filled with bliss. Until her marriage, at the age of twenty-one, she was indifferent to men and women alike. She began to menstruate at the age of eighteen. Her engagement was a matter of utter indifference to her. Her connubial duties were first painful and, later on, loathsome to her. She never experienced sensual pleasure, yet she became the mother of six children. Her husband began at that time to practise onanism (coitus interruptus). At the age of thirty-six she had an apoplectic stroke. From this time on she felt that a great change has taken place in her. She was mortified at being a woman. Her menstruation ceased. Her feminine features assumed a masculine expression. Her breasts disappeared. The pelvis became smaller and narrower, the bones more massive, the skin rougher and harder. Her voice grew deeper and quite masculine. Her feminine gait disappeared. She could not wear a veil. Even the odor emanating from her person changed. She could no longer act the part of a woman, and assumed more and more the character of a man. She complained of having strange feelings in her abdomen. She could no longer feel her muliebria. The vaginal orifice seemed to close and the region of her genitals seemed to be enlarged. She had the sensation of possessing a penis and a scrotum. At the same time she began to show symptoms of the male voluptas. In another case of Krafft-Ebing the patient, thirty-six years of age, commenced se stuprare manu at the time of puberty, when thirteen years old, and became homosexual when sixteen years of age. When twenty-six years old she had the feeling of transformation. She imagined muliebria sua turning into the male form and began to urinate like a man. She does not feel ashamed to undress in the presence of a man, but is shy to do it in the presence of a woman.