Alcyonium digitatum Linnaeus, 1758 (additional source)
Bolocera tuediae (Johnston, 1832) (additional source)
Cerianthus borealis Danielssen, 1860 accepted as Cerianthus lloydii Gosse, 1859 accepted as Synarachnactis lloydii (Gosse, 1859) (additional source)
Cerianthus danielseni (additional source)
Cirratulus caudatus Levinsen, 1893 (original description)
Edwardsia chrysanthellum (additional source)
Edwardsia clavata (Rathke, 1843) (additional source)
Hauchiella Levinsen, 1893 (original description)
Hauchiella peterseni Levinsen, 1893 accepted as Hauchiella tribullata (McIntosh, 1869) (original description)
Hormathia margaritae Gosse, 1859 accepted as Hormathia digitata (O.F. Müller, 1776) (additional source)
Ilyanthus scoticus Forbes, 1840 (additional source)
Metridium dianthus (Ellis, 1768) (additional source)
Peachia hastata Gosse, 1855 (additional source)
Polysiphonia mucronalis Levinsen, 1893 accepted as Haliclona (Haliclona) urceolus (Rathke & Vahl, 1806) (original description)
Sagartia miniata Gosse, 1853 accepted as Sagartia elegans (Dalyell, 1848) accepted as Cylista elegans (Dalyell, 1848) (additional source)
Sagartia viduata (Müller, 1778) (additional source)
Tealia crassicornis (Müller, 1776) accepted as Urticina crassicornis (Müller, 1776) (additional source)
Tealia digitata (Müller, 1776) accepted as Hormathia digitata (O.F. Müller, 1776) (additional source)

North Sea for Myxilla fibrosa Levinsen, 1893