Tetranemertes ocelata sp. nov. A external appearance in life B proboscis armature showing bilobed basis and sculpted stylets C head compressed under coverslip to show number and arrangement of eyes, cerebral organs and cerebral ganglia D head in ventro-lateral view showing eyes and the cephalic furrow (arrowhead). Abbreviations: cg — cerebral ganglion, co — cerebral organ. Scale bars: 1 mm (A); 50 μm (B); 0.2 mm (C, D).