PLATE 8 



Fig. 20. Fifth elytron of Harmothoe hirsuta. X 15. 



Fig. 21. Small section of the same elytron showing the large tubercles. X 75. 

 Fig. 22-24. Different kinds of tubercles of the same. X 75. 



Fig. 25. Fringe of the same elytron. X 75. 



Fig. 26. Tubercle of the same elytron, surface view. X 75. 



Fig. 27. Tenth elytron of Halosydna insignis (of commensal). X 15. 



Fig. 28. Tenth elytron of the same of free-living form. X 15. 



Fig. 29. Fringe of the same. X 75. 



Fig. 30. Tubercle of the same. X 75. 



Fig. 31. Fifth elytron of PoJynoe lordi. X 15. 



Fig. 32. Second elytron of Polynoe fragilis. X 15. 



Fig. 33. Tubercle of the first elytron of Lepidonotus squavxatiii^. X 310. 



Fig. 34. Highly magnified portion of the second elytron of Lepidonotus 

 squamatus showing the various types of tubercles and a few fringes. X 310. 



Fig. 35. First elytron of Lepidonotus squamatus. X 15. 



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