(Schopenhauer).  Then the conception of latent bisexuality, independently of homosexuality, was developed from the purely scientific side (by Darwin and evolutionists generally).  In the next stage this conception was adopted by the psychiatric and other scientific authorities on homosexuality (Krafft-Ebing and the majority of other students).  Finally, embryologists, physiologists of sex and biologists generally, not only accept the conception of bisexuality, but admit that it probably helps to account for homosexuality.  In this way the idea may be said to have passed into current thought.  We cannot assert that it constitutes an adequate explanation of homosexuality, but it enables us in some degree to understand what for many is a mysterious riddle, and it furnishes a useful basis for the classification not only of homosexuality, but of the other mixed or intermediate sexual anomalies in the same group.  The chief of these intermediate sexual anomalies are:  (1) physical hermaphroditism in its various stages; (2) gynandromorphism, or eunuchoidism, in which men possess characters resembling those of males who have been early castrated and women possess similarly masculine characters; (3) sexo-esthetic inversion, or Eonism (Hirschfeld’s transvestism or cross-dressing), in which, outside the specifically sexual emotions, men possess the tastes of women and women those of men.

Hirschfeld has discussed these intermediate sexual stages in various works, especially in Geschlechtsuebergaenge (1905), Die Transvestiten (1910), and ch. xi of Die Homosexualitaet.  Hermaphroditism (the reality of which has only of late been recognized and is still disputed) and pseudohermaphroditism; in their physical variations are fully dealt with in the great work, richly illustrated, Hermaphroditismus beim Menschen, by F.L. von Neugebauer, of Warsaw.  Neugebauer published an earlier and briefer study of the subject in the Jahrbuch fuer sexuelle Zwischenstufen vol. iv, 1902, pp. 1-176, with a bibliography in vol. viii (1906) of the same Jahrbuch, pp. 685-700.  Hirschfeld emphasizes the fact that neither hermaphroditism nor eunuchoidism is commonly associated with homosexuality, and that a large proportion of the cases of transvestism, as defined by him, are heterosexual.  True inversion seems, however, to be not infrequently found among pseudohermaphrodites; Neugebauer records numerous cases; Magnan has published a case in a girl brought up as a youth (Gazette medical de Paris, March 31, 1911) and Lapointe a case in a man brought up as a girl (Revue de psychiatrie, 1911, p. 219).  Such cases may be accounted for by the training and associations involved by the early error in recognition of sex, and perhaps still more by a really organic predisposition to homosexuality, although the sexual psychic characters are not necessarily bound up with the coexistence of corresponding sexual glands.  Halban (Archiv