Together with other invertebrates which he had collected, Dr. P. WAGENAAR HUMMELINCK sent to me — unwittingly — some polychaetes material preserved in alcohol and formalin which was not included in the material studied by ELISE WESENBERG-LUND (1958) in the eighth volume of these ‘Studies’. The five samples contain 6 complete worms and about 30 fragments, some with heads or tails. The material is taxonomically uniform and belongs to