Peter J. Hayward DSc., FLS began his career as Scientific Assistant at the Natural History Museum, London, and retired as Senior Lecturer in marine biology at Swansea University. Marine invertebrates have been his abiding interest, through many spring and autumn field courses, and practical laboratory exercises. He has published several books on marine biological topics, as editor, co-editor, author and co-author, and numerous scientific papers, especially on the marine Bryozoa. He has served as co-editor of the Journal of Natural History, and editor of the Zoological Journal of the Linnean Society, and is co-editor, with Dr John H. Crothers, of the Linnean Society Synopses of the British Fauna.