The genera Urticina and Cribrinopsis (Anthozoa: Actiniaria) from the north-western Pacific

Three species of Cribrinopsis and two species of Urticina from Kamchatka, Commander Islands, and the Sea of Okhotsk are discussed. It is confirmed that the widely distributed north-east Pacific anemone known as U. lofotensis (Tealia lofotensis: Hand, 1955) is different from the European species of the same name (Madoniactis lofotensis Danielssen, 1890) but is conspecific with Cribrinopsis albopunctata sp. nov. from Kamchatka. Urticina grebelnyi sp. nov. is a large species common in East Kamchatka and recorded also from Puget Sound from where it was previously known as U. crassicornis (Muller, 1776). Cribrinopsis olegi sp. nov. is a distinctive species with short, often almost spherical tentacles known only from East Kamchatka.