Amblyosyllis cincinnata (Verrill, 1874) accepted as Amblyosyllis finmarchica (Malmgren, 1867) (new combination reference)
Anaitis picta Verrill, 1885 accepted as Paranaitis speciosa (Webster, 1879) (source of synonymy)
Brada granulata Malmgren, 1867 accepted as Brada inhabilis (Rathke, 1843) (source of synonymy)
Brania clavata (Claparède, 1863) accepted as Salvatoria clavata (Claparède, 1863) (additional source)
Ceratocephale loveni Malmgren, 1867 (additional source)
Ceratocephale websteri Verrill, 1880 accepted as Ceratocephale loveni Malmgren, 1867 (source of synonymy)
Dodecaceria fimbriata (Verrill, 1879) (additional source)
Euclymene zonalis (Verrill, 1874) represented as Clymenella zonalis (Verrill, 1874) (additional source)
Eucranta villosa Malmgren, 1865 (additional source)
Eumida sanguinea (Örsted, 1843) (additional source)
Eumidia americana Verrill, 1873 accepted as Eumida sanguinea (Örsted, 1843) (source of synonymy)
Eupolynoe occidentalis McIntosh, 1874 accepted as Eucranta villosa Malmgren, 1865 (source of synonymy)
Eusyllis fragilis (Webster, 1879) (basis of record)
Eusyllis lucifer Verrill, 1875 accepted as Odontosyllis lucifera (Verrill, 1875) (source of synonymy)
Eusyllis tenera Verrill, 1882 accepted as Eusyllis fragilis (Webster, 1879) (source of synonymy)
Exogone dispar (Webster, 1879) (basis of record)
Gattiola cincinnata Verrill, 1874 accepted as Amblyosyllis finmarchica (Malmgren, 1867) (new combination reference)
Grubea websteri Verrill, 1882 accepted as Salvatoria clavata (Claparède, 1863) (source of synonymy)
Grymaea spiralis Verrill, 1874 accepted as Streblosoma spiralis (Verrill, 1874) (source of synonymy)
Heterocirrus fimbriatus Verrill, 1880 accepted as Dodecaceria fimbriata (Verrill, 1879) (source of synonymy)
Neanthes virens (M. Sars, 1835) accepted as Alitta virens (M. Sars, 1835) (additional source)
Nectonereis megalops Verrill, 1873 accepted as Platynereis megalops (Verrill, 1873) (source of synonymy)
Nereis alacris Verrill, 1880 accepted as Platynereis dumerilii (Audouin & Milne Edwards, 1833) (source of synonymy)
Nereis virens Sars, 1835 accepted as Alitta virens (M. Sars, 1835) (source of synonymy)
Odontosyllis lucifera (Verrill, 1875) (basis of record)
Paedophylax dispar Webster, 1879 accepted as Exogone dispar (Webster, 1879) (source of synonymy)
Paedophylax longiceps Verrill, 1880 accepted as Exogone dispar (Webster, 1879) (source of synonymy)
Paranaitis speciosa (Webster, 1879) (additional source)
Polydora littorea Verrill, 1881 accepted as Polydora cornuta Bosc, 1802 (redescription)
Praxilla elongata benedicti Webster, 1879 accepted as Praxillella elongata (Webster, 1879) (source of synonymy)
Praxilla zonalis Verrill, 1874 accepted as Clymenella zonalis (Verrill, 1874) (source of synonymy)
Praxillella elongata (Webster, 1879) (basis of record)
Scalibregma brevicauda Verrill, 1873 accepted as Scalibregma inflatum Rathke, 1843 (source of synonymy)
Scalibregma inflatum Rathke, 1843 (additional source)
Spio robusta Verrill, 1873 accepted as Spio setosa Verrill, 1873 (source of synonymy)
Spio setosa Verrill, 1873 (additional source)
Streblosoma spiralis (Verrill, 1874) (additional source)
Tetraglene agilis Verrill, 1882 accepted as Trypanosyllis agilis (Verrill, 1882) (source of synonymy)
Trypanosyllis agilis (Verrill, 1882) (basis of record)