[23] Westermarck, History of Human Marriage, p. 9.
[24] D. G. Brinton, Races and Peoples, p. 55. “The sequel of the sexual impulse is the formation of the family through the development of parental affection. This instinct is as strong in many of the lower animals as in human beings. In primitive conditions it is largely confined to the female parent, the father paying but slight attention to the welfare of his offspring. To this, rather than to doubt of paternity, should we attribute the very common habit in such communities of reckoning ancestry in the female line only.”
[25] The ostrich forms, however, a curious exception. The male sits on the eggs, and brings up the young birds, the female never troubling herself about either of these duties.—Brehm, Bird-Life, p. 324.
[26] Brehm, Bird-Life, p. 285, and Herman Müller’s Am Neste.
[27] Rengger, Naturgeschichte der Saugethiere von Paraguay, p. 354.
[28] Brehm, vol. iii., p. 206.
[29] Wallace, The Malay Archipelago, vol. ii., p. 447.
[30] Charles Morris Woodford, A Naturalist among the Head-Hunters, p. 31.
[31] Report to the Parliament of the Commonwealth of Australia on Papua, for 1909, Appendix D, p. 107.
[32] J. H. P. Murray, Papua or British New Guinea, 1912.