PLATE IIIa. 
Fig. 1. Simple slender dorsal bristle, minutely roughened toward the tip, 
of Hermodice carunculata, . . . . . x 350. 
Fig. 2. One of the stouter serrated dorsal bristles of the same, . . x 350. 
Fig. 3. One of the upper series of ventral bristles of the foregoing, with 
a more elongated tip, ..... x 350. 
Fig. 4. A stouter ventral bristle of the same species, . . . x 350. 
Fig. 5. Simple, slightly curved bristle of ^cf^ca, . . x 350. 
Fig. 6. One of the elongated slightly bifid dorsal bristles of the same, . x 350. 
Fig. 7. Third kind (stout serrated) of dorsal bristle of the foregoing, . x 350. 
Fig. 8. A long (superior) bifid ventral bristle of the same, with a finely 
serrated inner margin, . . . . . x 350. 
Fig. 9. One of the stouter ventral bristles of the preceding, having only 
three or four serrations near the tip, . . . x 350. 
Fig. 10. Elongated translucent bifid bristle of Eurythoe pacijtca, var. 
levuhaeiisis, . . . . . . . x350. 
Fig. 11. Stout serrated dorsal bristle of the same, . . . . x 350. 
Fig. 12. Ventral bristle (of medium size) from the anterior third of the fore- 
going species, . . . . . . x 350. 
Fig. 13. Simple translucent dorsal bristle of Hipponoe gaudichaudi, . x 350. 
Fig. 14. Bifid tip of one of the foregoing, ..... x 700. 
Fig. 15. Normal appearance of the lower part of the shaft of the same kind 
of bristle, only a slight roughness along the edge indicating 
the points, ....... x 700. 
Fig. 16. A compressed (and fissured) shaft of the same form, with more 
distinct indications of the points or serratures, . . x 700. 
Fig. 17. Bifid ventral hook of the preceding species, . . . x 350. 
