PLATE CXXVa.
Fig. 1. Anterior bristle of AmphitHte jigidus, Dalyell, 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, Sayigny (= gracilis,
Grube). X oc. 4, obj. D.
2 a. Bristle with more slender serrated tip. X oc. 4, obj. D.
2 6. 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.
8 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 b. 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. I).
5 b. Anterior hook. X oc. 2, obj. F, with draw-tube.
6. Slightly winged bristle of Parathelepus collaris, 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 Tkelepus t'riserialis, Grube. X oc. 2, obj. I).
7 a. Anterior bristle with very narrow wings without enlargement of the region. X oc. 2,
obj. D.
7 b. Hook from the middie 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.