record # 2 species Obelia Peron & Lesueur, 1810 longissima = gelatinosa Hinks 1868 acc Oestman Class Hydrozoa Subclass Thecatae-Leptomedusae (Calyptoblastea) Order Proboscoida Broch 1909 Suborder/superfamily Campanulariida Bouillon 1984; Campanulariidea Bouillon 1984 Family Campanulariidae Hincks 1868; Johnston (cf. Cornelius 1982) phenomorph various material Sweden, west cost: Gullmar Fjord; May­p;Sept., Oestman source of quantitative data Oestman, '82 '87 pMi b-M (various cap letter types) tent & various locations Mi b-M (various cap letter types) tent & various locations type mat. # length mean SD n Width mean SD n Length/width (range) Oestman'87 8.0­p;12.0(xc.2?)Mib-MFl-type Oestman'82 A tentacle 8 8.0­p;10.0 8.5 ±0.5 74 2.0­p;3.0 2.5 ±0.3 74 3.0­p;4.8 A hydrocaulus 6 7.0­p;9.0 8 ±0.5 55 2.0­p;3.0 2.5 ±0.3 55 3.0­p;4.8 A M 1 6.5­p;8.0 7 ±0.3 22 2.0­p;2.5 2.5 ±0.3 22 2.6­p;3.8 Fl C hydrotheca 9 9.0­p;11.0 10 ±0.6 114 2.5­p;3.5 3 ±0.3 114 3.0­p;4.4 Fl C hydrocaulus 7 8.0­p;11.0 9.5 ±0.6 98 2.5­p;3.5 2.8 ±0.3 98 2.9­p;4.4 Fl M 7 8.5­p;11.0 10 ±0.6 28 2.5­p;3.5 3 ±0.3 28 2.9­p;4.4 AI various I types) tent\ApI tent\HoI tent\MeI tent