FIGURE 3. A to D: Coryne sp.—Hydroid with propagulae budding off from tips of branch-like structures (A); fragment of fertile colony with medusa buds (B); propagula (C); nematocysts of the hydroid (left) and medusa bud (right) (D). E: Pennaria disticha Goldfuss, 1820—hydranth with gonophore. F: Sphaerocoryne bedoti Pictet, 1893—hydroid. G to I: Zyzzyzus warreni Calder, 1988b—hydroid with gonophores (G); female gonophore in frontal (above) and lateral (bottom) views, showing blastostyle and two developing actinulae (H); nematocysts of hydranth (I). J to L: Zanclea migottoi sp. nov.—pedicels, showing the structure of perisarc (J); fertile (left) and sterile (right) hydranths (K); nematocysts (L). M and N: Aequorea sp.—fragment of colony (M); nematocysts of hydranth (N). O and P: Clytia gracilis (M. Sars, 1850)—hydrotheca with pedicel (O); gonotheca (P). R and S: Clytia hummelincki (Leloup, 1935)—hydrotheca with pedicel (R); gonotheca (S). Scale bars: 10 µm (D, I, L, N); 100 µm (C); 200 µm (M, P); 300 µm (F, H, J, K, R); 400 µm (S); 500 µm (E, O); 1 mm (A, B, G).