FIGURE 17 in On some tropical hydroids (Cnidaria: Hydrozoa), with descriptions of four new species

FIGURE 17. Type materials of some poorly-known nominal species of sertulariids. A. Thuiaria maldivensis Borradaile, 1905: pair of hydrothecae (NHM 23.2.15.47). B. Tridentata occulta Stechow, 1926: pair of hydrothecae (ZSM 20041646). C. Sertularia tongensis Stechow, 1919b: pair of hydrothecae (ZSM 20041550). D, E. Tridentata westinidica Stechow, 1919a: stems (D), pair of hydrothecae (E) (both from sample ZSM 20050706). Scale bars: A–C, E = 100 µm; D = 1 mm. Photomicrographs by B. Ruthensteiner.