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 fuer Gynaekologie_
1903) goes so