The Evolution of Marriage and of the Family

by Ch. Letourneau

[15] Ibid. pp. 418, 453.

[16] Annali del Museo civico di storia naturale di Genova, t. ix. fase 3-4, 1877.

[17] Espinas, loc. cit., pp. 299, 438.

[18] Darwin, Descent of Man, p. 460.

[19] Houzeau, Facultés mentales des animaux, t. I^er. p. 292.

[20] Darwin, Descent of Man, pp. 550, 556.

[21] Darwin, Descent of Man, pp. 460, 461.

[22] Ibid. p. 457.

[23] Darwin, Descent of Man, p. 575.

[24] Ibid. p. 576.