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II, pp. 561-2. Morgan, T.H. Heredity and Sex. N.Y., 1913, pp. 155f. Lillie, F.R. Theory of the Free Martin. Science, n.s., Vol. XLIII, pp. 611-13. Neugebauer, F.L. Hermaphrodismus, Leipzig, 1908. Vincent, S. Internal Secretions and the Ductless Glands. London, 1912, p. 69. Marshall, F.H. Physiology of Reproduction. London, 1910, p. 314.
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