PLATE C. 



Fig. 



1. Tenth bristles (dorsal) of Dodecaceria conchanmi, GErsted. X 200. 



2. Fifth foot of Ghsetopterus variopedatus, Renier, from South Africa. X 15. 



3. Bristles of foot of Sclerocheilus minutus, Grube, from Sark. X 360. 



4. Fifth foot of Euspio Gravieri, Mel. x 40. 



4 a. Tenth foot of the same showing gland. X 40. 



6. Head and anterior region of Spio atlanticus, contracted in spirit. x about 40. 



7. Posterior foot of Aonides oxycephala, Sars. X 200. 



8. Portion of the fifth foot of Polydora Caulleryi, Mesnil. x 360. 



9. Portion of the fifth foot of Polydora guadrilobata, Jacobi. X 360. 



10. Portion of the fifth foot of Polydora flava, Claparede, St. Andrews, with peculiar 



spear-shaped bristles accompanying the hooks. X 360. 



11. Bristles of Polyophthalmus pictus, Dujardin, arising from the setigerous process. 



X 224. 



12. Anterior foot of Spio G. The specimen was crushed, but the foliaceus lamella is 



indicated. x 360. 



13. Ventral bristles of the twentieth foot of Cirratulus caudatus, Levinsen. X 133. 



14. Lateral view of the anterior region of Isoeirrus DA. Enlarged. 



14 a. Cephalic plate of the same seen from the dorsum. Enlarged. 



15. Profile of cephalic region of Leiochone borealis, Arwidsson, from North Uist. 



Enlarged. 



15 a. Anal region of the foregoing. Enlarged. 



16. Leiochone borealis, Arwidsson, from the North Sea. A prolapse of the gut has 



occurred at the vent. Enlarged. 



17. Posterior end of the same, from St. Magnus Bay, 1887. Enlarged. 



18. Leiochone (Clymene) ebiensis, Aud. & Edw. Slightly enlarged. 



19. Cephalic region with 2 bristled segments of Leiochone Johnstoni, McL, from Loch 



Alsh. Enlarged. 

 19 a. Anal region of the foregoing. Enlarged. 



20. Cephalic and anterior regions of Praxillella V, off Cape Guardia, ' Porcupine,' 1870. 



Enlarged. 



21. Anal region of Praxillell 'a pr deter missa, Malmgren. Enlarged. 



22. Lateral view of the head and anterior region of Pseudoclymene CErstedi, Claparede. 

 22 a. The same seen from the ventral surface. Enlarged. 



23. Anal region of Hetero clymene robusta, Arwidsson. Enlarged. 



