[63] “Introduction to Comparative Psychology,” p. 290.
[64] The Portfolio (1873), p. 27, “Canine Guests.”
[65] “Animal Intelligence,” pp. 28, 29.
[66] Nature, vol. xxxi., p. 200.
[67] Ibid., vol. li., p. 127.
[68] “Manual of Psychology,” p. 257.
[69] “Vegetable Mould and Earthworms,” p. 95.
[70] Wood’s Holl Biological Lectures (1898), p. 287.
[71] Supra, p. 44.
[72] “Mental Evolution in Man,” p. 27.