FIGURE 4. A in Additional shallow-water thecate hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles

FIGURE 4. A to D: Hydrodendron sp.—erect stem (A); internode with hydro- and nematotheca (B); nematothecae (C); cnidome (D). E to G: Hebella venusta (Allman, 1877)—hydrothecae (E); gonothecae (F); undischarged microbasic mastigophore from tentacle (G). H and I: Filellum serratum (Clarke, 1879)—two hydrothecae, of which one (H) on Sertularia tongensis (Stechow, 1909). J and K: Diphasia tropica Nutting, 1904—basal part of stem with two pairs of hydrothecae (J); gonotheca (K). L to N—Sertularella diaphana (Allman, 1885), morphotype 1—portion of cladium with two hydrothecae (L); hydrothecal aperture view from above (M); undischarged microbasic mastigophore from tentacle (N). O to R: S. diaphana, morphotype 2—portion of cladium with two hydrothecae (O); gonotheca (P); transverse section through gonotheca (Q); cnidome (R). Scale bars: 10 µm (D, G, N, R); 50 µm (C); 100 µm (B, H, I, M); 200 µm (E); 300 µm (A, K, L, O, Q); 500 µm (F, J, P).