Morphological and distributional observations on 11 of the 19 ampharetid species and subspecies recorded from British Columbia and Washington are presented. Hobsonia new genus and Sosanopsis hesslei new species are described, and remarks made on the generic diagnosis of Sosanopsis. Amage anops is studied from type material. Ampharete labrops, A. goesi brazhnikovi, Hobsonia florida, and Samytha californiensis are newly recorded for the Oregon biogeographic Province. Ampharete gagarae is shown to be restricted to deep water of the northeast Pacific and adjacent seas.