FIGURE 15 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species

FIGURE 15. Tridentata borneensis (Billard, 1925a). A–D. Internodes from proximal (A, B), middle (C) and distal (D) parts of caulus. E. Basal hinge joint. F. Fertile stem. G, H. Pairs of hydrothecae seen frontally. I, J. Hydrothecae seen laterally (I) and apically (J), note sculpture of the wall. K, L. Details of a hydrotheca, showing adaxial, arched ridge. From specimens: H.L. 709 (A, C–E, G, K), MSNMCoe370 (B, F, H–J, L). Scale bars: K, L = 100 µm; E, G–J = 200 µm; A–6, F = 500 µm.