off Christmas Harbour, Kerguelen Islands, subantarctic Indian Ocean, Challenger Expedition Sta. 149K (48°40'S, 69°06'E; -48.6667°, 69.1°; location from Tizard et al., 1885); 45-120 fathoms (= about 80-220 m), volcanic mud, picked out from debris of Laetmonice producta Grube, 1877