[236] Journal of Linnean Society, vol. xix.
[237] Hibbert Journal, January, 1903, p. 218.
[238] Revue de Philosophie, April 1, 1904.
[239] Souvenirs entomologiques, 3rd Series, p. 317.
[240] For some further testimonies on this head see Appendix.
[241] Nature, September 10, 1891.
[242] Coming of Age of the Origin of Species.
[243] De opere sex dierum, ii. 10, n. 12.
[244] Modern Idea of Evolution, p. 97.
[245] Darwin (Origin of Species, p. 274, 6th Edition) considers it "incredible" that the same identical species should originate twice even under the very same conditions. In the following passage, Haeckel affirms such unity of origin in respect of a most remarkable species of wide-reaching affinities.