PLATE XVIa. 
Fig. 1. Setigerous region of a foot of Syllis ramosa (parent stock), . x 400, 
Fig. 2. Dorsal bristle, from the tenth foot of Nereis (Platynereis) 
kobiensis, . . . . . . . x 400. 
Fig, 3, Amber-coloured hook from the inferior border of the group, from 
the thirty-seventh foot of the same, . . . . x 400. 
Fig. 4. One of the larger superior falcate bristles, from the inferior division 
of the foregoing foot, . . . . . . x 400. 
Fig. 5. One of the dorsal bristles, from the tenth foot of Nereis tonga- 
tabuensis, ....... x 400. 
Fig. 6. Falcate bristle, from the superior lobe of the thirty-seventh foot of 
the foregoing, . . . . . . x 590. 
Fig. 7. Falcate bristle, from the inferior lobe of the same foot, . . x 590. 
Fig, 8. Dorsal bristle, from the thirty-seventh foot of Nereis melanoce'phala^ x 400. 
Fig. 9. Distal end of a falcate bristle, from the ventral series of the same foot, x 400. 
Fig. 10. Setose dorsal bristle, from the thirty-seventh foot of Nereis atlantiea, x 400. 
Fig. 11. A falcate bristle, from the inferior division of the tenth foot of the 
same, ....... x 400, 
Fig. 12. Setose dorsal bristle, from the tenth foot of Nereis longisetis, . x 400. 
Fig. 13. One of the inferior ventral bristles, with very short setose tips, in the 
twenty-seventh foot of the foregoing, . . . x 400. 
Fig. 14. A setose bristle, from the dorsal series of Nereis antillensis, . x 400. 
Fig. 15, A falcate bristle, from the superior division of one of the posterior 
feet of the same, ...... x 400. 
Fig. 16. One of the upper falcate forms, from the ventral division of the foot 
posteriorly, ....... x 400. 
Fig. 17. Setose dorsal bristle, from the tenth foot of Nereis kerguelensis, . x 400. 
Fig. 18. One of the upper falcate bristles, from the inferior series of the tenth 
foot of the same, ..... ‘ x 530. 
Fig. 19. One -of the falcate bristles, from the inferior division of the foot of 
Nereis longisetis, . . . . . . x 400,. 
