LIST OF FIGURES. 



*iG F/.OK 



1. Pholas crispata, a burrowing Mollusc ; 8 



2. Sand-laimce (Ammodytes tobianus). After Day . . 9 



3. Hermit-crab and Hydr actinia. After All man . . 12 



4. ZWo coronata. After Alder and Hancock . . . . 13 



5. Dead Men's Fingers (Alcyonium digitatum) . . 16 



6. Swimming-bell (Sarsia). After Allman . . . 17 



7. Lump-sucker (Cyclopterus lumpus). After Day . . 21 



8. Edible crab (Cancer pagurus) . . 26 



9. Plumularia sctacea. After Hincks . . .29 



10. Fisherman's lob-worm (Arenicola piscatorum) . . 30 



11. Common scallop (I'ecten opercularis) . 31 



12. Diagram of Hydractinia. After Allman . . .41 



13. Clava squamata. After Allman . . .45 



14. Syncoryne eximia. After Allman . 46 



15. Sarsia, or swimming-bell. After Hincks . 47 



16. Tubularia indivisa. After Allman . 49 



17. Obelia geniculata. After Hincks . 51 



18. Campanularia flexuosa (magnified). After Hincks . 52 



19. Halecium halecinum (magnified). After Hincks . . 54 



20. Sertularia pumila and branch magnified. After Hincks 55 



21. Bottle-brush coralline (Thuiaria thuia). After Hincks 56 



22. Plumularia (magnified branch). After Hincks . . 57 



23. Common sea-anemone (Actinia mesembryanthemum) . 65 



24. Tealia crassicornis. After Tugwell . . .68 



25. Sagartia troglodytes . . . 70 



26. Actinoloba dianthus. After Tugwell . 73 



27. Haliclystus octoradiatus . . 78 



28. Nereis pelagica . . . 84 



29. Foot of Nereis pelagica. After Ehlers . .' . 86 



30. Introvert of Nereis pelagica. After Lang . 87 



vi 



