Corystolona [ex Reticularia] annulata, Fig. 5.-Group of three hydrothecae Fig. 6.-Distal end of hydrotheca, enlarged. Drawn from holotype.

From Watson, J.E. (1973), Pearson Island Expedition 1969 - 9. Hydroids. Transactions of the Royal Society of South Australia 97: 153-200

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