Fig. 2 in Polysyncraton (Ascidiacea, Didemnidae): a re-examination of some specimens and descriptions of three new species

Fig. 2. Polysyncraton amethysteum (Van Name, 1902), Florida (USNM 17364). a. Thorax with bifurcated atrial languet (small arrow) and thoracic organ (big arrow). b. Stained abdomen, sperm duct with five coils (arrow). c. Detail of the testis with four follicles and sperm duct with four coils (arrow). Scale bars: 0.1 mm.