PLATE XXI. 



Fier. I. Parapodium of Scalisetosus crinoidicola Potts. X 22. 



Fig. 2. Head of Scalisetosus papilliferus Horst. X 38- 



Fig. 3. Scale of the same species. X 38. 



Fig. 4. A papilla of the scale of the same species. X 360. 



Fig. 5. Scale of Scalisetosus tentaculatus Horst. X 29. 



Fig. 6. Notopodial bristle of the same species. X 198. 



Fiers. 7, a and b. Dorsal and ventral neuropodial bristle of the same species. X 198. 



Fig. 8. Parapodium of Scalisetosus sp. (Stat. 260). X 47. 



Fig. 9. Neuropodial bristle of the same species. X 360. 



Fig. 10. Notopodial bristle of the same species. X 360. 



Fig. II. Scale of Polyno'c cornuta Fischli. X 38. 



Fig. 12. Parapodium of the same species. X 38. 



Fig. 13. Head of Polynoë kampeni Horst, x 38. 



Figs. 14, a and b. Dorsal and ventral neuropodial bristle of the same species. X 250. 



Fig. 15. Head of Polyno'c nigro-punctata Horst. X 38. 



Fig. 16. Notopodial bristle of the same species. X 250. 



Fig. 17. Neuropodial bristle of the same species. X 250. 



Fig. 18. Scale of Polynoc versluysi Horst, x 48. 



Fig. 19. Parapodium of the same species, x 48. 



Fig. 20. Dorsal neuropodial bristle of Polynoc sp. (Stat. 267). X. 250. 



