• Aeolidia papillosa (Linnaeus, 1761)
• Amphorina pallida (Alder & Hancock, 1842)
• Borealea nobilis (A. E. Verrill, 1880) accepted as Coryphella nobilis A. E. Verrill, 1880
• Carronella pellucida (Alder & Hancock, 1843) accepted as Flabellina pellucida (Alder & Hancock, 1843)
• Catriona gymnota (Couthouy, 1838) accepted as Tenellia gymnota (Couthouy, 1838)
• Corruptobranchus sanjuanensis (Roller, 1972)
• Coryphella gracilis (Alder & Hancock, 1844)
• Coryphella nobilis A. E. Verrill, 1880
• Coryphella verrucosa (M. Sars, 1829)
• Cratena pilata (A. A. Gould, 1870)
• Cuthona concinna (Alder & Hancock, 1843) accepted as Fiocuthona concinna (Alder & Hancock, 1843)
• Cuthona gymnota (Couthouy, 1838) accepted as Catriona gymnota (Couthouy, 1838) accepted as Tenellia gymnota (Couthouy, 1838)
• Cuthona nana (Alder & Hancock, 1842)
• Cuthona pustulata (Alder & Hancock, 1854) accepted as Tenellia pustulata (Alder & Hancock, 1854)
• Cuthona stimpsoni A. E. Verrill, 1879 accepted as Ziminella salmonacea (Couthouy, 1838)
• Cuthona veronicae (A. E. Verrill, 1880)
• Cuthona viridis (Forbes, 1840) accepted as Diaphoreolis viridis (Forbes, 1840)
• Cuthonella concinna (Alder & Hancock, 1843) accepted as Fiocuthona concinna (Alder & Hancock, 1843)
• Diaphoreolis viridis (Forbes, 1840)
• Eubranchulus olivaceus (O'Donoghue, 1922)
• Eubranchus exiguus (Alder & Hancock, 1848) accepted as Nudibranchus exiguus (Alder & Hancock, 1848)
• Eubranchus olivaceus (O'Donoghue, 1922) accepted as Eubranchulus olivaceus (O'Donoghue, 1922)
• Eubranchus pallidus (Alder & Hancock, 1842) accepted as Amphorina pallida (Alder & Hancock, 1842)
• Eubranchus sanjuanensis Roller, 1972 accepted as Corruptobranchus sanjuanensis (Roller, 1972)
• Eubranchus tricolor Forbes, 1838
• Facelina bostoniensis (Couthouy, 1838)
• Fiocuthona concinna (Alder & Hancock, 1843)
• Fiona pinnata (Eschscholtz, 1831)
• Flabellina gracilis (Alder & Hancock, 1844) accepted as Microchlamylla gracilis (Alder & Hancock, 1844) accepted as Coryphella gracilis (Alder & Hancock, 1844)
• Flabellina nobilis (A. E. Verrill, 1880) accepted as Borealea nobilis (A. E. Verrill, 1880) accepted as Coryphella nobilis A. E. Verrill, 1880
• Flabellina pellucida (Alder & Hancock, 1843)
• Flabellina salmonacea (Couthouy, 1838) accepted as Ziminella salmonacea (Couthouy, 1838)
• Flabellina verrucosa (M. Sars, 1829) accepted as Coryphella verrucosa (M. Sars, 1829)
• Glaucus atlanticus Forster, 1777
• Microchlamylla gracilis (Alder & Hancock, 1844) accepted as Coryphella gracilis (Alder & Hancock, 1844)
• Nudibranchus exiguus (Alder & Hancock, 1848)
• Tenellia fuscata (A. A. Gould, 1870)
• Tenellia gymnota (Couthouy, 1838)
• Tenellia pustulata (Alder & Hancock, 1854)
• Tenellia viridis (Forbes, 1840) accepted as Diaphoreolis viridis (Forbes, 1840)
• Tergipes tergipes (Forsskål, 1775)
• Zelentia pustulata (Alder & Hancock, 1854) accepted as Tenellia pustulata (Alder & Hancock, 1854)
• Ziminella salmonacea (Couthouy, 1838)