Rosalinda marlina Watson. E, reticulate hydrorhiza with perisarcal spines and hydranth on barnacle Balanus trigonus Darwin: F, hydranth seated in perisarcal cup; G, section through hydrorhiza showing perisarcal tubes extending through hydrorhiza to surface; H - J, nematocysts from hydrorhiza — H, large mastigophore, undischarged; I, stenotele with short spines; J, small ?isorhiza, undischarged.

From Watson, J.E. (1978) New species and new records of Australian athecate hydroids. Proceedings of the Royal Society of Victoria 90(2): 301-314.

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