• Amphiporus angulatus (Müller, 1774)
• Amphiporus bioculatus Corrêa, 1958 accepted as Correanemertes bioculatus (Corrêa, 1958)
• Amphiporus bioculatus sensu Verrill, 1892 (uncertain)
• Amphiporus caecus Verrill, 1892 (uncertain > nomen dubium)
• Amphiporus frontalis Verrill, 1892 (uncertain > nomen dubium)
• Amphiporus griseus (Stimpson, 1855)
• Amphiporus groenlandicus Örsted, 1843 (uncertain > nomen dubium)
• Amphiporus heterosorus Verrill, 1892
• Amphiporus lactifloreus (Johnston, 1828)
• Amphiporus ochraceus (Verrill, 1873)
• Carcinonemertes carcinophila (Kölliker, 1845)
• Correanemertes bioculatus (Corrêa, 1958) (accepted > unreplaced junior homonym)
• Cyanophthalma cordiceps (Sars in Jensen, 1878) sensu Norenburg, 1986 accepted as Cyanophthalma vittata (Verrill, 1874)
• Cyanophthalma obscura (Schultze, 1851)
• Cyanophthalma vittata (Verrill, 1874)
• Malacobdella grossa (Müller, 1776)
• Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837)
• Nipponnemertes pulchra (Johnston, 1837)
• Oerstedia dorsalis (Abildgaard, 1806)
• Pseudocarcinonemertes homari Fleming & Gibson, 1981
• Tetrastemma candidum (Müller, 1774)
• Tetrastemma elegans (Girard, 1852)
• Tetrastemma vermiculus (Quatrefages, 1846)
• Tetrastemma vittatum (Hubrecht, 1879) sensu Bürger, 1895 accepted as Tetrastemma vittigerum (Bürger, 1904)
• Tetrastemma vittigerum (Bürger, 1904)
• Zygonemertes virescens (Verrill, 1879)