| Sabellides octocirrata (Sars, 1835) |
| Sabellides sexcirrata Sars, 1856 |
| Samytha Malmgren, 1866 |
| Samytha bioculata Moore, 1906 |
| Samytha californiensis Hartman, 1969 |
| Samytha sexcirrata (Sars, 1856) |
| Samythella Verrill, 1873 |
| Samythella elongata Verrill, 1873 |
| Samythella interrupta Fauchald, 1972 |
| Samythella pala Fauchald, 1972 |
| Schistocomus Chamberlin, 1919 |
| Schistocomus hiltoni Chamberlin, 1919 |
| Sosane Malmgren, 1866 |
| Sosane sulcata Malmgren, 1866 |