PLATE XIIa. 
Fig. 
1. 
Fig. 
2. 
Fig. 
3. 
Fig. 
4. 
Fig. 
5. 
Fig. 
6. 
Fig. 
7. 
Fig. 
8. 
Fig. 
9. 
Fig. 
10. 
Fig. 
11. 
Fig. 
12. 
Fig. 
13. 
Fig. 
14. 
Fig. 
15. 
Fig. 
16. 
Fig. 
17. 
Fig. 
18. 
Fig. 
19. 
Tip of dorsal bristle of Lagisca darwini, . . . . 
Extremity of one of the longer ventral bristles of the same, 
One of the shorter ventral bristles of the foregoing, 
Extremity of a dorsal bristle of Lagisca kermadecensis, 
One of the upper ventral bristles of the same in profile, 
Tip of one of the latter. Viewed antero-posteriorly. 
Dorsal bristle of Eunoa mindanavensis, .... 
Tip of a ventral bristle of the same species. 
Smooth dorsal bristle of Polynoe {Macellic&pliala) mirahilis^ 
One of the ventral bristles of the foregoing. 
Tip of one of the latter, ...... 
Tip of one of the dorsal bristles of Polynoe synopMhalma, . 
Tip of a ventral bristle of the same species. 
One of the shorter dorsal bristles of Lagisca hexactinellidcB, 
One of the superior (long) ventral bristles of the same, 
One of the inferior (shorter) ventral bristles. 
Tip of a ventral bristle of Polynoe {Admetella) longipedata, 
Tip of an average ventral bristle, from about the twentieth foot of 
Polynoe ocellata, ...... 
Tip of one of the powerful bristles, from the fiftieth foot of the 
same. The contrast with the former is bold. 
X 800. 
X 800. 
X 700. 
X 350. 
X 350. 
X 350. 
X 350. 
X 250. 
X 80. 
X 80. 
X 400. 
X 250. 
X 250. 
X 400. 
X 400. 
X 400. 
X 210. 
X 800. 
X 800. 
