Aeginella spinosa Boeck, 1861 (additional source)
Aeginina longicornis (Krøyer, 1843) (additional source)
Aequorea aequorea (Forsskål, 1775) accepted as Aequorea forskalea Péron & Lesueur, 1810 (additional source)
Alcyonidium gelatinosum (Linnaeus, 1761) (additional source)
Alcyonidium polyoum (Hassall, 1841) (additional source)
Amathia vidovici (Heller, 1867) (additional source)
Amphipholis squamata (Delle Chiaje, 1828) (additional source)
Amphitrite cirrata Müller, 1776 (additional source)
Ampithoe valida S.I. Smith, 1873 (additional source)
Anguinella palmata Van Beneden, 1845 (additional source)
Apistobranchus tullbergi (Théel, 1879) (additional source)
Arenicola cristata Stimpson, 1856 (additional source)
Aselomaris michaeli Berrill, 1948 accepted as Pachycordyle michaeli (Berrill, 1948) (additional source)
Autolytus prismaticus (O.F. Müller, 1776) accepted as Proceraea prismatica (O.F. Müller, 1776) (additional source)
Balanus amphitrite Darwin, 1854 accepted as Amphibalanus amphitrite (Darwin, 1854) (additional source)
Balanus balanus (Linnaeus, 1758) (additional source)
Balanus eburneus Gould, 1841 accepted as Amphibalanus eburneus (Gould, 1841) (additional source)
Balanus improvisus Darwin, 1854 accepted as Amphibalanus improvisus (Darwin, 1854) (additional source)
Barentsia laxa Kirkpatrick, 1890 (basis of record)
Bougainvillia rugosa Clarke, 1882 (additional source)
Bowerbankia imbricata (Adams, 1798) accepted as Amathia imbricata (Adams, 1800) (additional source)
Branchellion torpedinis Savigny, 1822 (additional source)
Bugula fulva Ryland, 1960 accepted as Bugulina fulva (Ryland, 1960) (additional source)
Bugula simplex Hincks, 1886 accepted as Bugulina simplex (Hincks, 1886) (additional source)
Byblis serrata S.I. Smith, 1873 (additional source)
Callinectes sapidus Rathbun, 1896 (additional source)
Callipallene brevirostris (Johnston, 1837) (additional source)
Caprella equilibra Say, 1818 (additional source)
Caprella linearis (Linnaeus, 1767) (additional source)
Caprella septentrionalis Krøyer, 1838 (additional source)
Carcinonemertes carcinophila (Kölliker, 1845) (additional source)
Caretta caretta (Linnaeus, 1758) (additional source)
Catriona gymnota (Couthouy, 1838) (additional source)
Cavolinia uncinata (A. d'Orbigny, 1835) (additional source)
Chaetogaster limnaei von Baer, 1827 (basis of record)
Chaetopterus variopedatus (Renier, 1804) (additional source)
Chaetozone setosa Malmgren, 1867 (additional source)
Chelonia mydas (Linnaeus, 1758) (additional source)
Chelonibia patula (Ranzani, 1818) accepted as Chelonibia testudinaria (Linnaeus, 1758) (additional source)
Childia groenlandica (Levinsen, 1879) (additional source)
Chiridotea caeca (Say, 1818) accepted as Chiridotea coeca (Say, 1818) (additional source)
Cirratulus cirratus (O. F. Müller, 1776) (additional source)
Clitellio (Clitellio) arenarius (Müller, 1776) (additional source)
Clymenella torquata (Leidy, 1855) (additional source)
Cryptosula pallasiana (Moll, 1803) (additional source)
Diacria trispinosa (Blainville, 1821) (additional source)
Diadumene leucolena (Verrill, 1866) (additional source)
Dodecaceria concharum Örsted, 1843 (additional source)
Doridella obscura A. E. Verrill, 1870 accepted as Corambe obscura (A. E. Verrill, 1870) (basis of record)
Dosima fascicularis (Ellis & Solander, 1786) (additional source)
Drilonereis longa Webster, 1879 (basis of record)
Dynamena cornicina McCrady, 1859 accepted as Dynamena disticha (Bosc, 1802) (additional source)
Ectopleura dumortierii (Van Beneden, 1844) (additional source)
Electra crustulenta (Pallas, 1766) accepted as Einhornia crustulenta (Pallas, 1766) (additional source)
Enchytraeus albidus Henle, 1837 (additional source)
Endeis spinosa (Montagu, 1808) (additional source)
Eteone lactea Claparède, 1868 accepted as Hypereteone lactea (Claparède, 1868) (additional source)
Eualus gaimardii (H. Milne Edwards, 1837) (additional source)
Eubranchus exiguus (Alder & Hancock, 1848) (additional source)
Eubranchus pallidus (Alder & Hancock, 1842) accepted as Amphorina pallida (Alder & Hancock, 1842) (additional source)
Eucheilota ventricularis McCrady, 1859 (additional source)
Eudendrium carneum Clarke, 1882 (additional source)
Eunice norvegica (Linnaeus, 1767) (additional source)
Exogone (Exogone) dispar (Webster, 1879) accepted as Exogone dispar (Webster, 1879) (additional source)
Fabricia sabella (Ehrenberg, 1836) accepted as Fabricia stellaris (Müller, 1774) (additional source)
Filograna implexa Berkeley, 1835 (additional source)
Flabellina gracilis (Alder & Hancock, 1844) accepted as Microchlamylla gracilis (Alder & Hancock, 1844) accepted as Coryphella gracilis (Alder & Hancock, 1844) (additional source)
Flabellina verrucosa (M. Sars, 1829) accepted as Coryphella verrucosa (M. Sars, 1829) (additional source)
Gammarus finmarchicus Dahl, 1938 accepted as Echinogammarus finmarchicus (Dahl, 1938) accepted as Echinogammarus incertae sedis finmarchicus (Dahl, 1938) (additional source)
Garveia franciscana (Torrey, 1902) accepted as Calyptospadix cerulea Clarke, 1882 (additional source)
Gattyana cirrosa (Pallas, 1766) accepted as Gattyana cirrhosa (Pallas, 1766) (additional source)
Gonionemus vertens A. Agassiz, 1862 (additional source)
Haliplanella lineata (Verrill, 1869) accepted as Diadumene lineata (Verrill, 1869) (additional source)
Halitiara formosa Fewkes, 1882 (additional source)
Harmothoe extenuata (Grube, 1840) (additional source)
Harmothoe imbricata (Linnaeus, 1767) (additional source)
Henricia sanguinolenta (O.F. Müller, 1776) (additional source)
Hermaea cruciata A. Gould, 1870 (basis of record)
Heteromysis (Heteromysis) formosa S. I. Smith, 1874 (additional source)
Hybocodon prolifer Agassiz, 1860 (additional source)
Hydroides dianthus (Verrill, 1873) (additional source)
Hyperia medusarum (Müller, 1776) (additional source)
Idotea balthica (Pallas, 1772) (additional source)
Idotea metallica Bosc, 1801 (additional source)
Janua (Dexiospira) spirillum (Linnaeus, 1758) accepted as Circeis spirillum (Linnaeus, 1758) (additional source)
Lamellaria perspicua (Linnaeus, 1758) accepted as Marsenia perspicua (Linnaeus, 1758) (additional source)
Laomedea calceolifera (Hincks, 1871) (additional source)
Lepas anserifera Linnaeus, 1767 represented as Lepas (Lepas) anserifera Linnaeus, 1767 (additional source)
Lepidochelys kempii Garman, 1880 (additional source)
Lepidonotus squamatus (Linnaeus, 1758) (additional source)
Leptosynapta roseola Verrill, 1874 accepted as Epitomapta roseola (Verrill, 1874) (additional source)
Libinia dubia H. Milne Edwards, 1834 (additional source)
Ligia oceanica (Linnaeus, 1767) (additional source)
Lineus sanguineus (Rathke, 1799) (additional source)
Lissodendoryx isodictyalis (Carter, 1882) represented as Lissodendoryx (Lissodendoryx) isodictyalis (Carter, 1882) (additional source)
Loimia medusa (Savigny, 1822) (additional source)
Lygia exotica Roux, 1828 accepted as Ligia (Megaligia) exotica Roux, 1828 (additional source)
Macrostomum Schmidt, 1848 (additional source)
Maldane sarsi Malmgren, 1865 (additional source)
Marphysa bellii (Audouin & Milne Edwards, 1833) accepted as Paucibranchia bellii (Audouin & Milne Edwards, 1833) (additional source)

English American tube-dwelling anemone for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English ceriantharian anemone for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English northern stony coral [from synonym] for Astrangia astreiformis Milne Edwards & Haime, 1849
English southern cerianthid for Ceriantheopsis americana (Agassiz in Verrill, 1864)
English star coral [from synonym] for Astrangia astreiformis Milne Edwards & Haime, 1849
English yellow flabby-sponge for Mycale (Carmia) fibrexilis (Wilson, 1894)