Some 47 nereid species, which have been referred directly or indirectly to
Leptonereis,
Nicon, and
Laeonereis, are reviewed and revised, based on examination of type-specimens, where available, and additional nereid material. Diagnoses are given for eight genera, two of them emended and two of them new. Sixteen species (including 16 synonyms) are referred to the eight genera, one of which is considered to be new. Supplementary descriptions and figures are given for fourteen of them. Four additional species are referred to
Platynereis Kinberg, one of which is described and figured. Four species are considered to be indeterminable.
