Auteur(s)	Cornelius, P.F.S.
Jaar	1995
Titel	North-West European Thecate Hydroids and their Meduse - Part 1 and 2. Synopses of the British Fauna (N.S.)., 50.

• Calicella syringa
• Clytia hemisphaerica
• Dynamena pumila
• Gonothyraea loveni
• Halecium halecinum
• Hartlaubella gelatinosa
• Obelia bidentata
• Obelia dichotoma
• Obelia geniculata
• Opercularella lacerata
• Sertularia cupressina