FIGURE 3. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 3. A to J: Halecium calderi sp. nov.—various habits (A); portions of stem and branches (B–D); hydrothecae (E–G); gonothecae in frontal (H) and lateral (I) views; nematocysts (J). K and L: Halecium dyssymetrum Billard, 1929— fragment of stem (K); nematocysts (L). M to O: Halecium tenellum Hincks, 1861—portion of stem (M); hydrotheca (N); undischarged microbasic mastigophore from tentacle (O). P to S: Halecium sp.—erect stem (P); dichotomous branching of stem (Q); hydrotheca (R); nematocysts (S). Scale bars: 10 µm (J, L, O, S); 100 µm (N, R); 200 µm (G); 300 µm (M, Q); 400 µm (B, D, E, F, P); 500 µm (C, H, I, K); 1 cm (A).