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30 Ganviviris told to Dr. Codrington in these islands an incident occurs in which a man hands over one of his wives to his sister's son, or, in other words, in which a man marries one of the wives of his mother's brother. Inquiries showed, not only that this form of marriage was once widely current in the islands, but that it still persists though in a modified form. The Christianity of the natives does not now permit a man to have superfluous wives whom he can pass on to his sister's sons, but it is still the orthodox, and indeed I was told the popular, custom to marry the widow of the mother's brother. It seemed that in the old days a man would take the widow of his mother's brother in addition to any wife or wives he might already have. Though this is no longer allowed, the leaning towards this form of marriage is so strong that after fifty years of external influence a young man still marries the widow of his mother's brother, sometimes in preference to a girl of his own age. Indeed, there was reason to believe that there was an obligation to do so, if the deceased husband had a nephew who was not yet married. The peculiar features of the terminology of relationship in these islands are exactly such as would follow from this form of marriage. If, in Diagram 2, C marries b, the wife or widow of his mother's brother, and thereby comes to occupy the social position of his uncle A, the children of the uncle, D and e, will come to stand to him in the relation