The irreducible minimum number of villages therefore totals 20. It is quite probable that some of the other sites might be or ought to be counted but, since the evidence concerning them is equivocal, they will not be included. The house counts for seven sites average 6.3 and since we are here dealing with informants' memories of inhabited houses, not house pits, this number need not be reduced. With respect to family number, the Yurok value of 7.5 is probably too high. For the type of culture characteristic of the Coast Yuki the more conservative value of 6.0 is probably better. This yields a population of 756, or approximately 750. It is difficult to see how this estimate could be reduced. _Coast Yuki ... 750_ THE YUKI PROPER Although the Yuki were a populous and important tribe, and although Kroeber, in the Handbook, devoted three chapters to their culture, they have been the subject of but one special study. Quite recently G. M. Foster (1944) resurveyed their ethnography and worked out their village organization in some detail. He utilized informants who were in their seventies during the period of 1935 to 1940 and who thus were born no earlier than 1860. Since the social and political organization of the Yuki was completely disrupted during the 'fifties, particularly at Round Valley, it is remarkable that Foster was able to secure so much apparently quite accurate detail. It is true that certain specific items of information derived by Kroeber from his informants of thirty or thirty-five years earlier are more reliable than the comparable data of Foster, nevertheless the over-all coverage by the latter is more complete. Foster's account will therefore serve here as the basis for a computation of population. There were eight major subdivisions or subtribes, the spelling of whose names and the precise boundaries of whose territories are slightly differently presented by Kroeber and Foster. Merely for convenience the description of Foster is followed here. Of the eight subtribes the most numerous and most important were the Ukomnom, who inhabited most of Round Valley. Next in importance were the Witukomnom directly to the south. Most of Foster's work was devoted to these two groups. With respect to village organization Kroeber brought out the basic fact that the tribe was organized by communities, rather than separate and wholly independent villages (1925, pp. 161-162). The community always might and usually did embrace several settlements.... If designated it was referred to by the name of the principal village. This place name therefore designates at one time a cluster of several little towns and on other occasions one of these towns.