PLATE CXXxX. 
Fie. 
1. Long slightly winged bristle of Chone Reayi, Mcl. x oc. 2, obj. D, with draw-tube. 
laand 1b. Paddle-shaped bristles. x oc. 4, obj. D, with draw-tube. 
1c. Anterior hook. x oc. 4, obj. D, with full draw-tube. 
1d. Posterior hook. x oc. 4, obj. F. 
le. Dorsal view of the collar and pedicle of the branchiz. Hnlarged under a lens. 
1/. Ventral view of the same. Enlarged under a lens. 
2. Paddle-like bristles of Chone Fauvelt, McI., and sections through the upper part of 
the shaft. Xx 280. 
2a. Shaft of long anterior hook (in section). X 280. 
2b. Posterior hook of foregomg. x oc. 4, obj. D. 
3. Long winged bristle of Chone Dunevi, Malmgren. X oc. 4, obj. D, with 13-in. draw- 
tube. 
3a. Oar-shaped bristle. x oc. 4, obj. F. 
3. Long anterior hook. X oc. 4, obj. D. 
3c. Posterior hook. xX oc. 4, obj. F. 
4, Anterior bristle of Myxicola infundibulum, Renier.  X oc. 4, obj. F. 
4a. Posterior bristle. Xx oc. 4, obj. D, with full draw-tube. 
4, Long anterior hook, seen antero-posteriorly. oc. 4, obj. D. 
4c. Terminal hook of arow. xX oc. 4, obj. D. 
5. Long anterior hook of Mywicola esthetica, Clapartde. X oc. 4, obj. D, with draw-tube. 
5a. Posterior hook. x oc. 4, obj. F, with 2-in. draw-tube. 
6. Bristle of Mywicola viridis, Milne-Edwards.  X oc. 4, obj. F. 
6a. Long anterior hook of same. X oc. 4, obj. F. 
6. Posterior hook. » oc. 4, obj. F. 
7. Finely tapered anterior bristle of Protula tubularia, Montagu, with very narrow 
wings. X oc. 2, obj. D. 
7a. Geniculate bristle. x oc. 4, obj. D. 
7b. Hook. x oc. 4, obj. F. 
8. Geniculate bristle of a variety of Protula tubularia, Mont., from St. Magnus Bay, 
Shetland. X oe. 2, obj. D. 
9 and 9’. Shghtly winged bristles of Hydroides norvegica, Gunner. X oc. 4, obj. D, 
with draw-tube. 
9a. Brush-shaped bristle. Xx oc. 4, obj. F. 
9b. Anterior hook. x oc. 4, obj. F. 
9c. Posterior hook. x oc. 4, obj. D. 
10. Anterior bristle of Serpula vermicularis, L., with spurs. xX oc. 4, obj. D, with 
draw-tube. 
10a. Simple, winged, serrated anterior bristle. xX oc. 4, obj. D, with draw-tube. 
106. Posterior bristle. Xx oc. 4, obj. D, with draw-tube. 
10c. Brush-shaped bristle. X oc. 4, obj. F. 
11. Tip of the tail of Cirratulus macintosht, Southern. Enlarged. 
lla. Bristles of the foregoing. x oc. 4, obj. D. 
12. Posterior hook of Chone infundibuliformis, Kroyer. xX oc. 4, obj. D. 
