The holotype ofLumbrineris algida(Wirén, 1901) has been examined and a new description made. A special type of twisted, pseudocompound hooded hook, previously undescribed, was studied by scanning electron microscopy. Mouthparts are missing. Seventeen additional specimens from eight different localities in Arctic waters were studied and compared with the holotype. These are all provided with the same kind of aberrant setae. Mouthparts show, however, thatL. algidabelongs to the genusAugeneriaMonro, 1930. All stations had negative bottom temperatures. A possible connection between low water temperature and the development of setae is discussed