of Echinocardium cordatum, [550];
absent in Pelmatozoa, [582]
Pedicellaster, [474]
Pedicellasteridae, [456], [474]
Pegantha, [296]
Peganthidae, [296]
Pekelharing, [187] n., [234] n., [237]
Pelagia, [311], [312], [315], [316], [323];
P. noctiluca, [311];
P. perla, [323];