_Calpella and Redwood Valleys._--This area is divided by Stewart into two subtribes, the Masut of Calpella and the Katca of Redwood Valley. This course is also followed by Kniffen who made a special investigation of the Kacha (Katca). On the other hand Merriam included both groups in his tribe, the Mah-soo-tah-ka-ah (his manuscript entitled "Northern Pomo"). The Kacha tribe all lived in the village given as Kacha by Kniffen and as Kabelal by Barrett, Merriam, and Stewart. Kniffen says "there must have been about 125 people in the valley...", but gives no supporting data. He does, on the other hand, mention that the village had 12 houses (1939, p. 375). At the aboriginal Pomo number of 14.0 there should have been 168 instead of 125 inhabitants. It is quite possible that Kniffen was thinking in terms of the early 1850's and hence made a low estimate. It appears to the present writer that 170 is preferable. Masut is given by Barrett and Stewart as a village but by Merriam as a tribe. Another village near by, Chom-cha-de-lah (Merriam) or Chomchadila (Powers, Kroeber) is admitted by Stewart and in fact given as the main village in his appendix (p. 57). Stewart also adds two villages, Diskabel and Kobida. It is evident that there were several villages closely clustered together. Stewart thinks there were four. Of these Masut and Chom-chah-de-lah were apparently large and the others perhaps small. We may allow 150 each for the larger ones and 50 each for the smaller, making 400 in all. The village of Matuku lay in the same territory. This is given the status of tribe by Merriam but was involved in the migrational movements between the Calpella region and Clear Lake. Hence its population is difficult to evaluate. Perhaps 100 persons will be adequate. In near-by Coyote Valley lived the tribe called by Powers the Shodokaipomo. This seems to be the general name for the subtribe and perhaps also for one of their villages (Barrett and Merriam). In addition, Merriam, following Barrett, lists Shah-chahm-kah-oo (called Shashamkau by Kroeber). Powers (1877) in commenting on this group has this to say: "Mr. Christy states that there were between three hundred and four hundred (people) when he arrived." Since there is no specific reason to doubt Mr. Christy's word, we may set the population of the subtribe at 350. The total for the entire area is 1,020. There are for the Calpella-Redwood Valley region 8 reasonably well authenticated villages, as follows: Kabelal (Barrett, Merriam, Stewart) Masut (Barrett, Stewart) Chom-cha-de-lah (Powers, Barrett, Merriam, Stewart, Kroeber) Matuku (Barrett, Merriam, Stewart) Shodo-kai (Barrett, Merriam, Powers) Shah-chahm-kah-oo (Barrett, Merriam, Kroeber) Diskabel (Stewart) Kobida (Stewart)