FIGURE 1. Lafoeina amirantensis. A in Lafoeina amirantensis (Cnidaria: Hydrozoa, Campanulinoidea), the hydroid stage of the medusa Cirrholovenia tetranema (Cnidaria: Hydrozoa, Lovenelloidea)

FIGURE 1. Lafoeina amirantensis. A) Part of a colony on seaweed. Note the tiny nematophores (arrows). B) Detail of a nematophore with a bundle of undischarged microbasic mastigophores nematocysts. C) Planuloid. D) Hydranth and nematotheca. E–G) Hydrotheca, SEM preparations. E) Lateral view. Note longitudinal depressions along distal part. F) Operculum, oral view. G) Operculum, lateral view. Note that it is not segmented, but a continuation of the hydrothecal wall which folds upon itself. Scale bars: A = 0.4 mm; B = 0.01 mm; C = 0.2 mm; D = 0.1 mm; E = 0.04 mm; F = 0.02mm.