3B-C, Campanularia [ex Orthopyxis] gaussica. Hydrothecae showing extremes of marginal dentition. 3B, Hydrotheca with eight pairs of sharply pointed marginal cusps. 3C, hydrotheca with five pairs of shallow marginal teeth with rounded cusps.

From Watson, J.E. (1997) The hydroid fauna of the Houtman Abrolhos Islands, Western Australia. In: Wells FE (ed) The Marine Flora and Fauna of the Houtman Abrolhos Islands, Western Australia. Western Australian Museum, Perth.

Photographer: Watson, Jeanette. Publisher: Watson, Jeanette.