Figure 1 in Morphology and natural history of the cryptogenic sponge associate Polydora colonia Moore, 1907 (Polychaeta: Spionidae)

Figure 1. Polydora colonia, adult morphology based on light microscopy (USNM1156935, 1156936, 1156937). (A) Anterior end, dorsal view showing ciliates (arrow) attached to chaetigers 5, 6 and 7. (B) Anterior end, lateral view. (C) Posterior chaetigers and pygidium, dorsal view showing curved boat hooks. (D) Notochaetae from chaetiger 5. (E) Three modified fifth chaetiger spines with companion chaetae. (F) Bidentate hooded hooks from chaetiger 10. (G) Two boat hooks from the posterior end. Scale: 250 µm (A); 100 µm (B, C); 25 µm (D–G).