Cirrholovenia tetranema Kramp, 1959

Hydrorhiza reptant, hydrothecae variable in length, arising directly from the hydrorhiza on very short but distinct pedicel, a faint constriction of the perisarc separating hydrotheca from pedicel; hydrotheca narrowest at base, body cylindrical or widening slightly to margin, often narrowing just below origin of operculum. Operculum consisting of approximately 10 long, sharply pointed segments, not clearly demarcated from margin.

Hydranth with 10-14 tentacles, capable of considerable extension and deep withdrawal into the hydrotheca; base of hydranth seated on a slight thickening of the perisarc immediately above the pedicel.

Nematothecae borne on the hydrorhiza, one between every three or four hydrothecae, clavate, maximum width about two-thirds the distance up from base, body narrowing to a small circular orifice; several elongate nematocysts clustered inside. Perisarc of colony very delicate and almost transparent, thinning distally on hydrotheca.

Colour: Colourless to white.