PLATE CXXVa. 



Fig. 



1. Anterior bristle of Amphitrite figulus, Daly ell, with a double expansion, x oc. 4, 



obj. A, full draw-tube. 



1 a. Hook. X 700 diam. 



2. Winged bristle, with terminal expansion, of Amphitrite scylla, Savigny (■= gracilis, 



Grube). x oc. 4, obj. D. 



2 a. Bristle with more slender serrated tip. x oc. 4, obj. D. 

 2 b. Anterior hook. X oc. 4, obj. D. 



2 c. Average hook, x oc. 4, obj. D. 



3. Bristle of Polymnia nebulosa, Montagu. X oc. 2, obj. D. 



3 a. Hook, x 700 diam. 



4. Antero-posterior view of winged bristle of Lanice conchilega, Pallas. X oc. 2, 



obj. D. 



4 a. Lateral view showing serrated edge of wing. X oc. 4, obj. D. 



4&. Shorter winged bristle with curved tip. X oc. 4, obj. D, full draw-tube. 



4 c. Hook. 



5. Anterior bristle of Polymnia nesidensis, D. Chiaje. X oc. 2, obj. F, with draw-tube. 



5 a. Middle bristle. X oc. 2, obj. D. 



6 b. Anterior hook. X oc. 2, obj. F, with draw-tube. 



6. Slightly winged bristle of Paraihelepus eollaris, Southern. X oc. 4, obj. D, with 



1-in. draw-tube. 

 6 a. Anterior hook. X oc. 4, obj. F, with 1-in. draw-tube. 



6 b. Posterior hook. X oc. 4, obj. F, with 1-in. draw-tube. 



7. Winged bristle of Thelepus triserialis, Grube. X oc. 2, obj. D. 



7 a. Anterior bristle with very narrow wings without enlargement of the region. X oc. 2, 



obj. D. 



7 b. Hook from the middle region. X oc. 4, obj. D, with 1-in. draw-tube. 



8. Anterior slightly winged bristle of Pista cristata, 0. F. Muller. X oc. 4, obj. D. 



8 a. Bristle with broader wings from S.W. Ireland. X oc. 4, obj. D. 

 8 b. Sparsely pinnate or whorled bristle. X oc. 2, obj. D. 



8 c. Hook of specimen from Lochmaddy, North Uist. X 700 diam. 

 8 c\ Anterior hook from St. Magnus Bay. 



8 c". Posterior hook. 



9. Hook of Artacama proboscidia, Malmgren, from Canada. X oc. 4, obj. A, with 2-in. 



draw-tube. 



9 a. Hook approaching the foregoing, off St. Peter Port, Guernsey, 1868. X oc. 4, 



obj. A. 



10. Anterior bristle of Amphitrite gigantea, Montagu, with terminal enlargement, and 



serrated tip seen more or less antero-posteriorly. X oc. 2, obj. D. 

 10 a. Another with narrower wings and the distal region seen laterally. X oc. 2, obj. D. 

 10 b. Hook of specimen sent by Prof. Fauvel. X oc. 4, obj. D, with 2-in. draw-tube. 



11. Anterior edge of hook of Spirorbis granulatus, L., showing bifid terminal process. 



