LIST OP THE WOOD-CUTS. 



Unless otherwise specified, the illustrations are drawn from nature by Alex. Asassiz. 



I'M. Page 



1. Transverse section of an Actinia (Agassiz) 5 



2, 3, 4. Actinia in different degrees of expansion (Agassiz) . . 8 



5. Meteidium marginatum fully expanded 8 



6. Vertical section of an Actinia 10 



7. View from above of an expanded Actinia 11 



8. 9. Young ActinijB 11 



10. Ehodaotinia Davisii ; . 13 



11. Aeachnaotis brachiolata 14 



12. Toung Arachnactis 14 



13. Toung Araohnactis showing the mouth . . . . ' . . 14 



14. BlCIDIUM paeasitiodm . 15 



15. Halcampa albida 16 



16. Colony of Asteangia Dan^ 17 



17. Magnified individuals of Astrangia 17 



18. Single individual of Astrangia 18 



19. Lasso-cell of Astrangia 18 



20. Limestone pit of Astrangia 19 



21. Single individual of Halotonhtm caeneum 19 



22. Halcyonium community 20 



23. Expanded individual of Halcyonium 20 



24.* Branch of Millbpoea alcicoenis (Agassiz) . . - . . .22 



25. Expanded animals of Millepora (Agassiz) 22 



26. Transverse section of branch of Millepora (Agassiz) . . . .23 



27. Pleurobeaohia rhododaottla (Agassiz) 27 



28. The same as Kg. 27 seen in plane of tentacles (Agassiz) . . .28 



29. Pleurobrachia in motion 29 



30. Pleurobrachia seen from the extremity opposite the mouth . . 30 



31. BoLiNA ALATA sccn from the broad side (Agassiz) .... 31 



32. BoUna seen firom the narrow side (Agassiz) 31 



33. Idtia eoseola seen from the broad side (Agassiz) .... 32 



34. Young Pleurobrachia still in the egg 35 



35. Young Pleurobrachia swimming in the egg 35 



36. Young Pleurobrachia resembling already adult 35 



37. Young Idyia 35 



38. Young Idyia seen from the anal pole 36 



