[15] The 15th Chapter of Haeckel's Natural History of Creation is devoted to this point.
[16] Confession of Faith of a Man of Science, p. 32.
[17] Riddle of the Universe, p. 5.
[18] Ibid., p. 78.
[19] Ibid., p. 86.
[20] Ibid., 134.
[21] An Easy Outline of Evolution, by Dennis Hird, M.A., Principal of Ruskin Hall, Oxford, p. 230.
[22] Presidential Address, Section D, Zoology, Leeds, 1890.
[23] Riddle of the Universe, p. 2.
[24] Ibid., p. 83.