Acontiaria Stephenson, 1935 (original description)
Actinauge richardi (Marion, 1906) (additional source)
Actinia equina (Linnaeus, 1758) (additional source)
Actinothoe alderi (Cocks, 1851) (additional source)
Actinothoe bellii (Cocks, 1851) (additional source)
Adamsia palliata (Fabricius, 1779) accepted as Calliactis palliata (Müller, 1776) (additional source)
Anemonia sulcata (Pennant, 1777) (additional source)
Anthopleura ballii (Cocks, 1851) (additional source)
Anthopleura thallia (Gosse, 1854) (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Bunodactis verrucosa (Pennant, 1777) (additional source)
Calliactis parasitica (Couch, 1842) (additional source)
Cataphellia brodricii (Gosse, 1859) (additional source)
Cereus pedunculatus (Pennant, 1777) (additional source)
Diadumene cincta Stephenson, 1925 (additional source)
Edwardsia allmani McIntosh, 1866 accepted as Edwardsia allmanni McIntosh, 1865 (additional source)
Edwardsia delapiae Carlgren & Stephenson, 1928 (additional source)
Edwardsia goodsiri M'Intosh, 1866 (additional source)
Gonactinia prolifera (Sars, 1835) (additional source)
Gregoria fenestrata Gosse, 1860 (additional source)
Halcampa chrysanthellum (Peach in Johnston, 1847) (additional source)
Halcampella Andres, 1883 (additional source)
Halcampoides purpurea (Studer, 1879) accepted as Halcampoides purpureus (Studer, 1879) (additional source)
Hormathia coronata (Gosse, 1858) (additional source)
Hormathia digitata (O.F. Müller, 1776) (additional source)
Ilyanthus scoticus Forbes, 1840 (additional source)
Isophelliidae accepted as Andvakiidae Danielssen, 1890 (original description)
Metridium senile (Linnaeus, 1761) (additional source)
Nematostella Stephenson, 1935 (original description)
Nematostella vectensis Stephenson, 1935 (original description)
Paraphellia expansa Haddon, 1886 (additional source)
Peachia hastata Gosse, 1855 (additional source)
Phellia gausapata Gosse, 1858 (additional source)
Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia troglodytes (Price in Johnston, 1847) accepted as Cylista troglodytes (Price in Johnston, 1847) (additional source)
Stomphia coccinea (Müller, 1776) (additional source)