Presumably extreme cases like the above are rare. Obviously operations
cannot be performed on all those with female-type bodies who do not bear
children, to determine the primary sex, and conversely with men. This
does, however, point the obvious question: Are not some we classify as
men _more male_ or masculine than others--some we classify as women
_more feminine_ than others? Bearing in mind the fact that the genetic
basis for both sexes exists in each individual, are not some women more
masculine than others, some men more feminine than others? However much
we may object to stating it just that way, the biological fact remains
thus. The Greeks called these intermediate types _urnings_--modern
biology knows them as "intersexes."

Only within the past few years have the general phenomena of
intersexuality been cleared up to any considerable extent--naturally on
the basis of the secretory explanation of sex. This secretory or
endocrine idea has also given us an entirely new view of sex
differences. These are best discussed as functional rather than as
structural. To correlate this material, we must next give a rude sketch
of the quantitative theory of sex.

BIBLIOGRAPHY FOR CHAPTER II

1. Goldschmidt, R. Intersexuality and the Endocrine Aspect of Sex.
Endocrinology, Vol. I, p. 434, 1917.

2. Bell, Dr Blair. The Sex Complex. London, 1916, p. 98.

3. Paton, D. Noel. Regulators of Metabolism. London, 1913, p. 146.

4. Goodale, H.D. Gonadectomy...Carnegie Pub. 243, 1916, pp. 43f.

5. Wilson, Andrew. Polity of a Pond (essay). Humboldt Lib. of Sc.,
No. 88--reprint, dated 1888.

6. Hollingworth, L.S. Variability as Related to Sex Differences in
Achievement. Am. Jour, of Sociol., XIX., 1914, pp. 510-530.

7. Lowie, R.H. & Hollingworth, L.S. Science and Feminism. Sci. Mthly.,
Sept., 1916, pp. 277-284.

8. Montague, Helen & Hollingworth, L.S. Comparative Variability of the
Sexes at Birth. Am. J. of Sociol. XX, 335-70. 1915.

9. Morgan, T.H. A Critique of the Theory of Evolution. N.Y., 1916,
pp. 1-27.

10. Loeb, Jacques. Artificial Parthenogenesis and Fertilization.
Chicago, 1913, pp. 3, 51f., 240f, 303.

11. Conklin, E.G. Organ-Forming Substances in the Eggs of Ascidians.
U. of Pa. Contrib. from the Zool. Lab. Vol. 12. 1905, pp. 205-230.

12. Loeb, J. The Organism as a Whole. N.Y., 1916, pp. 138f, 151-2.

13. Guyer, M.F. Being Well-Born. Indianapolis, 1916, p. 51.

14. Tower, W.L. (et al.). Heredity and Euge