What, now, are the results of form II--limited exogamy with direct maternal or paternal descent? It is at once clear that such exogamy prohibits all the various marriage connections proscribed by unlimited exogamy. Marriage between brothers and sisters is rendered impossible, as is also, in the case of maternal descent, that between a son and his mother or the relatives in her clan. Marriage between father and daughter, however, is permitted. Where paternal descent prevails, these latter conditions are reversed. Although forms I and II are to this extent in complete agreement, they nevertheless show a very important difference with respect to the prohibitions which they place on marriage. In unlimited exogamy, a man is at liberty to marry into any totem that belongs to the clan with which his own has exogamous relations; in limited exogamy, however, he may marry into only _one_ of the totems of such a clan. Thus, the circle within which he may select a wife is very materially reduced. Limited exogamy with direct maternal or paternal descent, accordingly, means a _reapproach to endogamy_. The wife must be chosen from an essentially smaller group, narrowed down, in the case of maternal descent, to the more immediate relatives of the father, or, in paternal descent, to those of the mother. Such a condition is not at all a strict form of exogamy, as is maintained by some ethnologists, but is, on the contrary, something of a return to endogamy. This point is of decisive importance in determining the motives of the remarkable institution of exogamy.