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158 far and wide, they seem to have preserved a definite clan system throughout.

We have just noted how the clan-gens grouping seemed to be independent of the tribal grouping and was not necessarily a political scheme. We may, therefore, be prepared to learn that clans are sometimes grouped or linked in ways peculiar to themselves. Thus, among the Menomini of the eastern maize area, we have the several gentes in groups of three or more, in each of which one is regarded as the leading gens. A somewhat similar crude sort of linking is reported for the Arizona Apache, though in this case for clans. Evidence for certain kinds of linking occurs among the Pueblo villages and elsewhere. The phenomenon is of interest here only in that it is the vaguer and less definite of such associations, for when two or more of the clan-gens groups are subordinated to a complementary division of the tribal unit, they are considered a phratry. What we have noted as to the association between the clan-gens system and marriage restrictions, applies here also, for exogamous linked groups are likely to be mutually exogamous. The phratry also may become the controlling unit as, for example, among the Iroquois.

In addition to the social groups we have so far considered, we find another peculiar one. Thus, among certain Pueblo Indians of southwestern United States (the Tewa), the village is divided in two halves, or moieties, known as summer and winter people, since one has charge of certain functions in summer, the other in winter. A similar grouping is reported for the Caddoan and a part of the Siouan stock in the Mississippi Valley, the Miwok of California, and also among the Iroquois of the East. In such cases the clans or gentes are sometimes disregarded, but are usually treated as subdivisions of the moiety. For example, the Seneca division of the Iroquois had four clans in one moiety and an equal number in the other. Though in this case equally divided, we find the Hidatsa with four in one and three in the other, and the Pawnee with two in one and eleven in the other. As an