[30] The Cell in Development and Inheritance, p. 207.

[31] Jenaische Zeitschrift, 1891, p. 410.

[32] See Wilson, op. cit., p. 299.

[33] Journal of the Linnean Society, vol. xx, p. 133.

[34] American Journal of Physiology, 1899, iii, 3.

[35] Contributions to the Study of the Early Development and Embedding of the Human Embryo. Glasgow, 1911.

[36] Berliner klinische Wochenschrift, June 14, 1915.

[37] Id is a word derived from Nägeli's term idioplasm, which means the chromosome granule.

[38] Thoughts of a Catholic Anatomist, p. 48.

[39] Contemporary Review, September, 1893.