Note 14 — Appendix
Reading edition
The best modern account of these complex subjects will be found in the advanced text-book, "The Physiology of Reproduction," pp. xvii., 706, by F. H. A. Marshall. Reference may be made to original papers by J. Beard in the Anat. Anzeiger for 1897; and by Heape in the Philosophical Trans. Royal Society, 1894, 97.