FIGURE 18 in Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa

FIGURE 18. Halecium tangaroa sp. nov.: A–B, basal part of two stems (note the basal rings); C, fragment of stem with primary and lower-order hydrothecae and origin of a branch from hydrophore of a fourth-order hydrotheca; D, internode with hydrophore and primary hydrotheca; E, detail of lower-order hydrothecae; F, general view of a female gonotheca; G–H, detail of female gonothecae with eggs (arrow). Scale bar: 200 µm (A–D, F), 100 µm (E, G–H).