penis in their clitoris. The raphé of the scrotum shows where the aperture, common at first to masculine and feminine beings, but afterwards only retained in the female vulva, was closed up to form a male. Other anatomical details of the same sort might be adduced. But these will suffice to make thinking persons reflect upon the mysterious dubiety of what we call sex. That gradual development, which ends in normal differentiation, goes on very slowly. It is only at the age of puberty that a boy distinguishes himself abruptly from a girl, by changing his voice and growing hair on parts of the body where it is not usually found in women. This being so, it is surely not surprising that the sexual appetite should sometimes fail to be normally determined, or in other words should be inverted.
Ulrichs maintains that the body of an Urning is masculine, his soul feminine, so far as sex is concerned. Accordingly, though physically unfitted for coition with men, he is imperatively drawn towards them by a natural impulse. Opponents meet him with this objection: "Your position is untenable. Body and soul constitute one inseparable entity." So they do, replies Ulrichs; but the way in which these factors of the person are combined in human beings differs extremely, as I can prove by indisputable facts. The body of a male is visible to the eyes, is mensurable and ponderable, is clearly marked in its specific organs. But what we call his soul—his passions, inclinations, sensibilities, emotional characteristics, sexual desires—eludes the observation of the senses. This second factor, like the first, existed in the undetermined stages of the fœtus. And when I find that the soul, this element of instinct
