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Rh been led to see that we have here a problem for exact inquiry. Such a custom among ourselves must certainly own a cause different from that to which I have ascribed the Melanesian practice, but is it certain that there is no social practice among ourselves which would lead to the classing of the wife's sister with the sister and the sister's husband of a woman with the brother? I will only point to the practice of marrying the deceased wife's sister, and content myself with the remark that I should be surprised if there were any general tendency to class these relatives together by a people among whom this form of marriage is the orthodox and habitual custom.

Till now I have been dealing with relatively small variations of the classificatory system. The varieties I have so far considered are such as would arise out of a common system if in one place there came into vogue the cross-cousin marriage, in another place marriage with the wife of the mother's brother, in another that with the granddaughter of the brother or with the wife of the grandfather, and in yet other places combinations of these forms of marriage. I have now to consider whether it is possible to refer the main varieties of the classificatory system to social conditions; as an example with which to begin, I choose one which is so definite that it attracted the attention of Morgan, viz., the variety of the classificatory system which Morgan called "Malayan." It is now generally recognised that this term was badly chosen. The