Plate I. 



Fig. i. Isozoanthus arborescens 2 / t (from Mortsund). 

 2. '/! (from Tranodybet). 



3, 4. danicus 2 / I ou oyster shells. In fig. 3 also on the right side an Ascidian. 



5. bulbosiis 2 / z (Romer & Schaudinn). 



6. */i (from Ingolf Exp. St. 104). 



7. magninsulosus z / z (from Ingolf Exp. St 10). 



8. Epizoanthus paguriphilus l / l (from Michael Sars Exp. 1900). 



9. Parazoanthus haddoni on sponges I / I (from N. N. W. of Bergen. Uddstrom R. M. No. 270). 



- 10. '/, (from N. W. of Bergen. Mattsson 1880 R. M. No. 740). 



- ii. ou sponges */, (from N. N. W. of Bergen. Uddstrom R. M. No. 270). 



- 12. Epizoanthus norvegicus (from Trondhjem Fjord). 



- 13. danielsseni 2 /j (from Sophia Exp.). 



- 14. erdmanni '/, (from Spitsbergen Exp. St. 42). 



- 15. danielsseni a little magnified (from Spitzb. Exp. St. 42). 



- 16. erdmanni 4/j capitulum from the oral side. 



- 17. erdmanni I / I (from Greenland Exp. 1899). 

 18. Isozoanthus multinsulosus 2 /, (from Ingolf Exp. St. 51). 



- 19. Parazoanthus anguicomus 2 /, (= E. americanus var. Verrill U. S. F. C. St. 2245). 



