[399] Descent of Man, p. 612.
[400] Origin, p. 164.
[401] Descent of Man, p. 100.
[402] Life, vol. II, p. 347.
[403] To Hooker, February 9, 1865, More Letters, vol. I, p. 260.
[404] To Lyell, August 21, 1861, More Letters, vol. I, p. 194.
[405] To Gray, May 22, 1860, Life, vol. II, p. 105.
[406] Descent of Man, p. 612.
[407] Animals and Plants, vol. II, p. 428.
[408] Family Letters, vol. II, p. 196.