Thelepus cincinnatus external morphology. A, C–I lateral view of anterior end B detail, showing eyespots G dorsal view of anterior end H ventral view of anterior end I lateral view of posterior end (arrow indicates last segment with notochaetae). A, B, F, I Alaid st. 30.13 C Alaid st. 8 D, E, H, G Alaid st. 6. All worms except A, B, F stained with methylene blue D, F arrow indicates nephridial papillae. Scale bars: 2 mm except B 0.5 mm.