GENERAL & I * Hydroids and medusae of the family \* UBRA V ^ Campanulariidae recorded from the eastern North ^/ Atlantic, with a world synopsis of genera P. F. S. Cornelius Zoology Department, British Museum (Natural History), Cromwell Road, London SW7 5BD, England Contents Synopsis 38 Type designations 38 Introduction 38 Taxonomy and the phenotype 39 Ecology 43 Geographical distribution 44 Key to species 45 Taxonomic section 47 Family Campanulariidae 47 The subfamily divisions and their nomenclature 49 Subfamily Campanulariinae 50 Genus Campanularia 51 Campanularia crenata 52 Campanularia hincksii 53 Campanularia volubilis . . 55 Genus Orthopyxis 57 Orthopyxis crenata 58 Orthopyxis integra 60 Genus Rhizocaulus 67 Rhizocaulus verticillatus 67 Subfamily Clytiinae nom. nov 69 Genus Clytia 70 Clytia discoida Clytia hemisphaerica 73 Clytia hummelincki 82 Clytia islandica 84 Clytia linearis 84 Clytia mccradyi 87 Clytia paulensis . 88 Clytia incertae sedis . 91 Subfamily Obeliinae Genus Gonothyraea 91 Gonothyraea loveni 92 Genus Hartlaubella 94 Hartlaubella gelatinosa Genus Laomedea Laomedea angulata. 98 Laomedea calceolifera 102 Laomedea flexuosa 105 Laomedea neglecta 107 Laomedea pseudodichotoma Ill Bull. Br. Mus. nat. Hist. (Zool.) 42 (2) ; 37-148 Issued 29 April 1982 37