Aequorea albida A. Agassiz, 1862 (basis of record)
Agalma elegans (M. Sars, 1846) (additional source)
Bougainvillia superciliaris (L. Agassiz, 1849) (additional source)
Catablema vesicarium (A. Agassiz, 1862) (additional source)
Clytia gracilis (M. Sars, 1851) (additional source)
Cuspidella grandis Hincks, 1868 (additional source)
Cuspidella humilis Hincks, 1866 (additional source)
Dicoryne flexuosa Sars, 1874 accepted as Dicoryne conferta (Alder, 1856) (additional source)
Eudendrium arbusculum Wright, 1859 accepted as Eudendrium arbuscula Wright, 1859 (additional source)
Eudendrium cingulatum Stimpson, 1853 (basis of record)
Eudendrium insigne Hincks, 1861 accepted as Eudendrium ramosum (Linnaeus, 1758) (additional source)
Euphysa aurata Forbes, 1848 (additional source)
Halopsis ocellata Agassiz, 1865 (additional source)
Hybocodon pendulus (L. Agassiz, 1862) accepted as Corymorpha pendula L. Agassiz, 1862 (additional source)
Hybocodon prolifer Agassiz, 1860 (additional source)
Hydractinia americana (Mayer, 1910) accepted as Podocoryna americana (Mayer, 1910) (basis of record)
Hydractinia echinata (Fleming, 1828) (additional source)
Hydractinia valens Fraser, 1941 (additional source)
Lafoea gracillima (Alder, 1856) accepted as Lafoea dumosa (Fleming, 1820) (basis of record)
Laomedea neglecta Alder, 1856 (additional source)
Lensia conoidea (Keferstein & Ehlers, 1860) (additional source)
Lytocarpia myriophyllum (Linnaeus, 1758) (additional source)
Melicertum octocostatum (M. Sars, 1835) (additional source)
Mitrocomella polydiademata (Romanes, 1876) (additional source)
Nemertesia americana (Nutting, 1900) (basis of record)
Nemertesia antennina (Linnaeus, 1758) (additional source)
Nemopsis bachei L. Agassiz, 1849 (additional source)
Opercularella lacerata (Johnston, 1847) (additional source)
Pericladium mirabilis (Verrill, 1873) (basis of record)
Physalia physalis (Linnaeus, 1758) (additional source)
Polyplumaria gracillima (G.O. Sars, 1873) (additional source)
Proboscidactyla Brandt, 1835 (additional source)
Protohydra leuckarti Greeff, 1870 (additional source)
Ptychogena lactea Agassiz, 1865 (additional source)
Rathkea octopunctata (M. Sars, 1835) (additional source)
Rhacostoma atlanticum L. Agassiz, 1851 (basis of record)
Rhizogeton fusiformis L. Agassiz, 1862 (basis of record)
Sarsia lovenii (M. Sars, 1846) (additional source)
Sarsia mirabilis L. Agassiz, 1849 accepted as Sarsia tubulosa (M. Sars, 1835) (basis of record)
Staurophora mertensii Brandt, 1835 accepted as Staurostoma mertensii (Brandt, 1835) (additional source)
Tamarisca tamarisca (Linnaeus, 1758) (additional source)
Thuiaria articulata (Pallas, 1766) (additional source)
Thuiaria laxa Allman, 1874 (basis of record)
Tiaropsis multicirrata (M. Sars, 1835) (additional source)