PLATE CXXVII.
Fig. 1. Slightly winged bristle of Poly cirrus aurantiacus, Grrube. X oo. 4, obj. D, with full
draw-tube.
1 a. Simple bristle with faintly serrated edge. X oc. 4, obj. D, with full draw-tube.
1 6. Anterior hook. X oc. 4, obj. F, with 2-in. draw-tube.
1 c. Posterior hook. X oc. 4, obj. F, with 2-in. draw-tube.
2. Slightly winged and curved bristle of Polycirrus hæmatodes, Claparède. X oc. 4,
obj. D, with draw-tube.
2 a. Another with slight serrations on the edge; X oc. 4, obj. D, with draw-tube.
2 b. Brush-shaped form, apparently from friction. X oc. 4, obj. F.
2 c. Anterior hook. X oc. 4, obj. F, full draw-tube.
2 cl and 2 d'. Posterior hooks near the tail. X oc. 4, obj. F, with 1-in. draw-tube.
8. Simple bristle of Lysilla Lovent, Malmgren. X oc. 2, obj. D.
4. Simple winged bristle of Trichobranchus glacialis, Malmgren. X oc. 4, obj. D.
4 a. Long curved and slightly winged bristle. X oc. 4, obj. D.
4 b. Long anterior hook. X oc. 4, obj. D, with full draw-tube.
4 c. Posterior hooks in various positions. X 900 diam.
4 d. Dorsal view of the anterior end. Enlarged.
4 e. Lateral view. Enlarged;
5. 5' and 5". Antero-posterior and lateral views of the bristles of T'erebellides stroemi,
Sars. x oc. 2, obj. D.
5 a. Long anterior hook. X oc. 2, obj. D.
5 a!. Head of another example. X oc. 4, obj. D.
5 b. Posterior hook. X oc. 2, obj. D.
6. Bristle of the first series of Sabella penicillus, L. X oc. 2, obj. D.
6 a. Another with broader tip. X oc. 2, ôbj. D.
6 6. Tapering bristle (with bellied tip) of posterior region. X oc. 2, obj. D.
6 c. Bristle with wing and long tapering point from the same region. X oc. 2, obj. D.
6 d . Group of bristles from the second region. X 280.
6 e. Minute (flag) bristle 'with broad tip accompanying the hooks. X 280.
6/. Anterior hook. X oc. 4, obj. D, with draw-tube.
6 g. Posterior hook. X oc. 4, obj. D, with draw-tube.
6 h. Capillary bristle from the posterior region. X oc. 4, obj. D.
6i. Winged bristle with slender tapering tip from the same region. X oc. 4, obj. D.
7. Simple bristle of Polycirrus denticulatus, De St. Joseph. X oc. 4, obj. D, full drawtube.
7 a. Anterior bristle slightly winged, x oc. 4, obj. F.
7 6. Anterior hook, x oc. 4, obj. F.
7 c. Hook from the tail. X oc. 4, obj. F.
8. Anterior hook of Poly cirrus caliendrum. X oc. 4, obj. F.
8 a. Posterior hook. X oc. 4, obj. F, with 1-in. draw-tube.