[170] Ibid. p. 368.
[171] Ibid. p. 369.
[172] Expression of the Emotions, pp. 65 ff.
[173] Cf. William James, Principles of Psychology, Vol. ii. Chap. xxv, New York, 1890.
[174] Darwinism, pp. 282, 283, London, 1889.
[175] Ibid. p. 283.
[176] Darwinism, pp. 283, 284.
[177] Descent of Man (2nd edit.), Vol. ii. pp. 136, 137; (Popular edit.), pp. 642, 643.
[178] The Play of Animals, p. 244, London, 1898.
[179] Ibid. p. 283.