PLATE CXXVII. 



Fig. 



1. Slightly winged bristle of Poly cirrus aurantiacus, Grube. X oc. 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 b. 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 hsematodes, Claparede. 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 d and 2 d'. Posterior hooks near the tail. X oc 4, obj. F, with 1-in. draw-tube. 



3. Simple bristle of Lysilla Loveni, 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 Terebellides strcemi, 



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 ijenicillus, L. X oc. 2, obj. D. 



6 a. Another with broader tip. X oc. 2, obj. D. 



6 b. Tapering bristle (with bellied tip) of posterior region. X oc. 2, obj. D. 



\s6c. Bristle with wing and long tapering point from the same region, x oc. 2, obj. D. 



i/fSd. Group of bristles from the second region, x 280. 



I 6 e. Minute (flag) bristle with broad tip accompanying the hooks. X 280. 



6f. Anterior hook. X oc. 4, obj. D, with draw-tube. 

 M) #. Posterior hook. X oc. 4, obj. D, with draw-tube. 

 \J6 h. Capillary bristle from the posterior region, x oc. 4, obj. D. 

 \J>i. 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 draw- 



tube. 



7 a. Anterior bristle slightly winged, x oc. 4, obj. F. 

 7 b. Anterior hook, x oc. 4, obj. F. 



7 c. Hook from the tail. X oc. 4, obj. F. 



8. Anterior hook of Polycirrus caliendrum. X oc. 4, obj. F. 



8 a. Posterior hook. X oc. 4, obj. F, with 1-in. draw-tube. 



