• 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)
• Cephalothrix linearis (Rathke, 1799)
• Cephalothrix spiralis Coe, 1930
• Cerebratulus fuscus (McIntosh, 1874)
• Cerebratulus lacteus (Leidy, 1851)
• Cerebratulus luridus accepted as Tarrhomyos luridus (Verrill, 1873)
• Cerebratulus marginatus [Renier], [1804]
• Cerebratulus melanops Coe & Kunkel, 1903
• Cerebratulus montgomeryi Coe, 1901 accepted as Kulikovia montgomeryi (Coe, 1901)
• 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)
• Drepanophorus lankesteri Hubrecht, 1887 accepted as Hubrechtonemertes lankesteri (Hubrecht, 1887)
• Fragilonemertes rosea (Leidy, 1851)
• Hubrechtonemertes lankesteri (Hubrecht, 1887)
• Kulikovia montgomeryi (Coe, 1901)
• Lineus arenicola (Verrill, 1873)
• Lineus bicolor Verrill, 1892 accepted as Tenuilineus bicolor (Verrill, 1892)
• Lineus ruber (Müller, 1774)
• Lineus sanguineus (Rathke, 1799)
• Lineus viridis (Müller, 1774)
• Malacobdella grossa (Müller, 1776)
• Micrura affinis (Girard in Stimpson, 1854)
• Micrura dorsalis Verrill, 1892
• Micrura leidyi (Verrill, 1892)
• Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837)
• Nipponnemertes pulchra (Johnston, 1837)
• Oerstedia dorsalis (Abildgaard, 1806)
• Procephalothrix spiralis (Coe, 1930) accepted as Cephalothrix spiralis Coe, 1930
• Pseudocarcinonemertes homari Fleming & Gibson, 1981
• Punnettia lankesteri (Hubrecht, 1887) accepted as Hubrechtonemertes lankesteri (Hubrecht, 1887)
• Ramphogordius sanguineus (Rathke, 1799) accepted as Lineus sanguineus (Rathke, 1799)
• Siphonenteron bicolour (Verrill, 1892) accepted as Tenuilineus bicolor (Verrill, 1892)
• Tarrhomyos luridus (Verrill, 1873)
• Tenuilineus bicolor (Verrill, 1892)
• 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)