Anaitis Malmgren, 1865 accepted as Paranaitis Southern, 1914 (source of synonymy)
Aonides paucibranchiata Southern, 1914 (original description)
Chaetozone zetlandica McIntosh, 1911 (redescription)
Chone filicaudata Southern, 1914 (original description)
Eteone caeca Ehlers, 1874 accepted as Hypereteone foliosa (Quatrefages, 1865) (source of synonymy)
Eteone foliosa Quatrefages, 1866 accepted as Hypereteone foliosa (Quatrefages, 1865) (additional source)
Euchone rosea Langerhans, 1884 (additional source)
Marphysa fallax Marion & Bobretzky, 1875 accepted as Paucibranchia fallax (Marion & Bobretzky, 1875) (additional source)
Microphthalmus sczelkowii Mecznikow, 1865 (additional source)
Opisthodonta pterochaeta Southern, 1914 accepted as Streptodonta pterochaeta (Southern, 1914) (original description)
Paedophylax hebes Webster & Benedict, 1884 accepted as Parexogone hebes (Webster & Benedict, 1884) (new combination reference)
Paranaitis Southern, 1914 (original description)
Paranaitis kosteriensis (Malmgren, 1867) (additional source)
Paranaitis wahlbergi (Malmgren, 1865) (new combination reference)
Pholoe tuberculata Southern, 1914 accepted as Pholoe baltica Örsted, 1843 (original description)
Pionosyllis pulligera (Krohn, 1852) accepted as Nudisyllis pulligera (Krohn, 1852) (basis of record)
Pionosyllis serrata Southern, 1914 accepted as Nudisyllis pulligera (Krohn, 1852) (original description)
Pisionidae Ehlers, 1901 accepted as Pisioninae Ehlers, 1901 (additional source)
Proclea graffi [auctt.] accepted as Proclea graffii (Langerhans, 1884) (basis of record)
Sphaerosyllis bulbosa Southern, 1914 (original description)
Spio martinensis Mesnil, 1896 (additional source)
Sthenelais zetlandica McIntosh, 1876 accepted as Fimbriosthenelais zetlandica (McIntosh, 1876) (additional source)
Streptosyllis bidentata Southern, 1914 (original description)
Streptosyllis websteri Southern, 1914 (original description)
Syllis (Typosyllis) alternosetosa Saint Joseph, 1887 accepted as Syllis armillaris (O.F. Müller, 1776) (source of synonymy)
Syllis pulligera Krohn, 1852 accepted as Nudisyllis pulligera (Krohn, 1852) (source of synonymy)