Note 271 — Chapter VII
Reading edition
Thus, if there are four clans, A, B, C, and D, as among the Kamilaroi, for example, the children sprung from the parents of the clans A and B may not intermarry; they belong to the clan C, the members of which may only marry with the members of the clan D. It is their children only who will be able to contract marriages in the groups A and B. In this way incest is only possible between the grandfather and the granddaughter, that is to say, reduced practically to zero.