%0 Journal Article %T Taxonomy of the European Hydra (Cnidaria: Hydrozoa): a re-examination of its history with emphasis on the species H. vulgaris Pallas, H. attenuata Pallas and H. circumcincta Schulze %A CAMPBELL, RICHARD, D. %J Zoological Journal of the Linnean Society %V 95 %N 3 %P 219-244 %@ 0024-4082 %D 1989-03-01 %I The Linnean Society of London %~ DeepDyve