[Footnote 92: E. Lloyd Jones, "Further Observations on the Specific Gravity of the Blood in Health and Disease," _Journal of Physiology_, Vol. XII, p. 308.] [Footnote 93: Cf. Topinard, _Loc. cit._, pp. 517-25, 557, 558.] [Footnote 94: Ibid., p. 559.] [Footnote 95: H. Ploss, _Das Weib in der Natur--und Völkerkunde_, 3. Aufl., Vol. II, p. 379.] [Footnote 96: Endogamous tribes have survived, in the main, in isolated regions where competition was not sufficiently sharp to set a premium on exogamy. It may be assumed that the history of exogamous groups has been more cataclysmical.] [Footnote 97: L.H. Morgan, _Houses and House-Life of the American Aborigines_, p. 64.] [Footnote 98: _Loc. cit._] [Footnote 99: W.J. McGee, "The Beginning of Marriage," _American Anthropologist_, Vol. IX, p. 376.] [Footnote 100: E.B. Tylor, "The Matriarchal Family System," _Nineteenth Century_, July, 1896, p. 89.] [Footnote 101: Fison and Howitt, _Kamilaroi and Kurnai_, pp. 33ff.] [Footnote 102: F. Ratzel, _History of Mankind_, Vol. I, p. 438.] [Footnote 103: J. Lippert, _Kulturgeschichte_, Vol. II, p. 57.] [Footnote 104: Lubbock, _Origin of Civilization_, p. 151.] [Footnote 105: Tylor, _loc. cit._, p. 87.] [Footnote 106: W. Robertson Smith, _Kinship and Marriage in Early Arabia_, p. 65.] [Footnote 107: Ibid., p. 94.] [Footnote 108: Ibid., p. 173.] [Footnote 109: Gen. 24:5, 53.] [Footnote 110: Gen. 31:43.] [Footnote 111: Judg. 8:19.] [Footnote 112: Judg. 15.] [Footnote 113: Cf. Smith, _loc. cit._, 176.] [Footnote 114: II Sam. 13:13.] [Footnote 115: G.A. Wilken, _Das Matriarchat_, p. 41.] [Footnote 116: Herodotus (Rawlinson), I, 173.] [Footnote 117: Ibid., III, 119.] [Footnote 118: Lines 905ff.] [Footnote 119: E.J. Simcox, _Primitive Civilisations_, Vol. I, pp. 200-11, 233, _et passim_.] [Footnote 120: Notably, Westermarck, _History of Human Marriage_, pp. 100ff.] [Footnote 121: _Dissertation on Early Law and Custom_, p. 202.] [Footnote 122: It prepares the way, however, only in the sense that it furnishes the mass out of which the organization arises. If there had been no social grouping through reproduction, there would yet have been ultimately filiation of men for the sake of mutually profitable enterprises. Blood-brotherhood and the treaty are devices indicating that early man had sufficient inventive imagination to do this. The tribal group may, in fact, be described as a fighting male organization living in a group of females.] [Footnote 123: See L. von Dargun, _Mutterrecht und Vaterrecht_.] [Footnote 124: J.W. Powell, "Wyandot Government", _First Annual Report of the Bureau of American Ethnology_, 1879-80, pp. 61ff.] [Footnote 125: Waitz-Gerland, _Anthropologie der Naturvölker_, Vol. V, pp. 107ff.] [Footnote 126: Lippert, _Kulturgeschichte_, Vol. II, p. 50.] [Footnote 127: C.N. Starcke, _The Primitive Family_, p. 37.]