Eudendrium glomeratum Picard, 1952

Lower stem lightly fascicled, branches unfascicled. The branches are given off from around the main stem in roughly three planes, upwardly directed, rebranching common, 3-6 annulations at origin, perisarc smooth and shining throughout.

Hydranths terminal on branches, moderately large, with 24-28 tentacles, body of 50% of the hydranths with 3-5 prominent button-shaped nematocyst pads in the proximal region.

Female gonophores in various stages of maturity are borne in a cluster of 4-6 on the body of the hydranth, spadix of immature gonophore unbranched, with a distal nematocyst pad, lost at maturity. Mature blastostyle with either a normal number of tentacles or a reduced number of 6-8 partly-atrophied tentacles. Mature gonophore elongate, enclosed in a thin pellicle, retained in original position on hydranth or slightly displaced down the blastostyle.

Nematocysts of two kinds present:

— Microbasic euryteles, 7-8 x 3-4 µm, shaft 4-6 µm long, broad, with prominent spines and bristles, thread ropy. Abundant in tentacles. Length-width ratio, 2:1.

— Large (?)macrobasic euryteles, capsule bean shaped, ends blunt, 19-22 x 9-10 µm, few discharged, length-width ratio 2.3:1. Distal part of shaft thick and armed with bristles, undischarged shaft lying in one or two loosely oblique coils inside capsule. Very abundant in the nematocyst pads on hydranths and on the gonophores.

Colour: Perisarc brown, hydranths white.