Name given to successor communities of the Berkeley Pattern living on the Pacific shore of the central west coast of North America in the period c.ad 300 to recent times. Essentially hunter‐gatherer fishing populations, widespread and scattered, these groups are characterized by technical innovations such as the use of bows and arrows, harpoons, tubular tobacco pipes, and the custom of burning artefacts in a grave before the body was interred. These developments are associated with the movement of Utian‐speaking Wintun people of the Sacramento Valley. After ad 1400 population numbers and density rose steeply. Intercommunity exchange assumed great importance and clam shell ‘money’ came into circulation.