PLATE XL. 



Fig. 



1. Dorsal bristle of Evarne Hubrechti. X 60. 



2. The same, x 60. 



3. Tip of dorsal bristle, x 210. 



4. Tip of ventral bristle. X 350. 



5. Dorsal bristle (average) of Loenilla setosissima, Sav. x 350. 



6. Ventral bristle (average) of Loenilla setosissima, Sav. x 350. 



7. Tip of dorsal bristle of Antinoe Sarsi. X 200. 



8. Tip of ventral bristle of Antinoe Sarsi. x 200. 



9. A nearly straight dorsal bristle of Antinoe finmarchica. X 210. 



10. An outer slightly curved bristle from the same group. X 210. 



11. Median ventral bristle (South-west Ireland). X 210. 



12. Dorsal bristle from posterior region of Antinoe mollis. X 210. 



13. Median ventral bristle of Antinoe mollis. X 210. 



14. The same. X TOO. 



15. One of the largest dorsal bristles of Phyllantinoe mollis. X 350. 



16. Ventral bristle. X 350. 



17. Dorsal bristle of Scalisetosus pellueidus. x 700. 



18. Ventral bristle. X 700. 



19. Distal region of a dorsal cirrus, x 90. 



20. One of the larger dorsal bristles of Scalisetosus assimilis. x 350. 



21. One of the shorter dorsal bristles. X 350. 



22. Ventral bristle. X 350. 



23. Dorsal bristle of Malmgrenia castanea. X 350. 



24. Superior ventral bristle. X 350. 



25. Inferior ventral bristle. X 350. 



2(u Tip of a ventral bristle from Valencia, showing secondary process. X 350. 



27. One of the larger dorsal bristles of Malmgrenia andreapolis. x 700 



28. Superior ventral bristle. X 350. 



29. Median ventral bristle. X 700. 



30. Inferior ventral bristle. X 700. 



