PLATE XXXa. 
Fig. 1. Superior bristle, from the anterior region of Sabella hipunctata, . x 350. 
Fig. 2. An inferior bristle, from the same group, . . . . x 350. 
Fig. 3. Anterior hook of the foregoing, ..... x 390. 
Fig. 4. Dorsal bristle (with shorter tip than usual), from the anterior 
region of Sabella fusca, . . . . . x 126. 
Fig. 5. Tip of inferior bristle, from the same foot, . . . . x 126. 
Fig. 6. Anterior hook of the species, ..... x 390. 
Fig, 7. Upper bristle, from the posterior region of Laonome haeckelii, x 350. 
Fig. 8. Tip of inferior bristle, from the same foot, . . . . x 350. 
Fig. 9. Hook of the same species, . . . . . . x 390. 
Fig. 10. Tip of an anterior bristle, from the upper series in Brancliiomma 
vesiculosum, . . . . . . . x 210. 
Fig. 11. Tip of another, from the inferior group, . . . . x 210, 
Fig. 12. Anterior hook of the foregoing form, . . . . x 390. 
Fig. 13. Tip of an upper bristle, from the anterior region of Dasychone 
bairdi, . . . . . . . x 350. 
Fig. 14. Tip of an inferior bristle, from the same part, , . . x 350. 
Fig. 15. Anterior hook of the foregoing species, . . . . x 390. 
Fig. 16. Tip of an upper anterior dorsal bristle of Dasychone picta, . x 390. 
Fig. 17. Tip of an inferior bristle, from the same foot, slightly turned 
round so as to show both wings, . . . . x 390. 
Fig. 18. Anterior hook of the foregoing species, . . . . x 390. 
Fig. 19. Tip of anterior bristle (dorsal group) of Dasychone orientcdis, . x 350. 
Fig. 20. Tip of one, from the inferior group, . . . . x 350. 
Fig. 21. Anterior hook of the preceding form, . . . . x 390. 
Fig. 22. Tip of anterior bristle (upper) of Dasychone japonica, . x 210. 
Fig. 23. Tip of bristle, from the inferior group of the same part, . . x 210. 
Fig. 24. Anterior hook of the foregoing, ..... x 390. 
Fig. 25. One of the anterior bristles (with shorter tip) of Placostegus ornatus, x 350. 
Fig. 26. Posterior bristle, from the same, . . . . . x 350. 
Fig. 27, Anterior hook of the foregoing, . . . . . x 700. 
Fig. 28. Anterior hook of Plaeostegus benthalianus, . . . x 700, 
Fig. 29. Anterior bristle (with “ bite ” at tip) of Placostegus mbrchii, . x 350. 
Fig;. 30. Anterior hook of the same, ..... x 700. 
Fig, 31. Tip of an anterior bristle of Vermilia sp. (Station 302), . . x 350. 
Fig. 32. Anterior hook of the foregoing, the posterior margin incomplete, . x 700. 
