marriage regulations of the tribe do account for this phenomenon. But on the other hand, the marriage rules fail where the moiety hypothesis succeeds. Why are the mother’s younger sister, who cannot be married, and the father’s brother’s wife classed with the marriageable cross-cousin and the wife’s brother’s daughter unless it is because they are all members of the same moiety? So far as the merging of a maternal uncle’s male descendants through males with the uncle himself is concerned, I do not see how any marriage rule would directly explain the extension of the term _ad infinitum_ while moiety alignment at once renders it intelligible. An advantage which the exogamous principle enjoys over every special marriage rule is the universality of its sway over the population. An individual’s wife may not have a brother and her brother may not have a daughter for the husband to marry, but where exogamous groups exist every tribesman is by birth a member of a particular group. To the subject of specific marriage rules I shall have to revert below. My position as to the Miwok nomenclature is that special regulations undoubtedly account for some of its features while the dual organization successfully explains others and more particularly the Omaha variant of the Dakota principle. We may sum up our discussion of the Dakota principle with the statement that its distribution, coupled as it is with exogamous groups, supports the theory of an organic connection between the two phenomena. On the question which I have hitherto shelved, _viz._, whether it is exogamy in any form or more particularly the dual organization that gave rise to the features under discussion, I am at present unable to reach a definite decision. Though the distribution of the moiety is far more restricted than that of exogamous groups generally, there is no doubt that not a few elements of the Dakota principle are most readily derived from a dual organization. It remains for the future to determine what is the relative part taken by the multiple kin group and the moiety organization in fashioning kinship nomenclature.