PLATE III. 



Fig. 1. Flustra ca.rbo.sea, Ellis & Sol., Mehavn, 1894, Vi- 



2. Flustra securifrons, Pallas, Breisund (Finmarken), l /i. 



3. Flustra membranaceo-truneata, Smitt, Skjerstad Fiord, Vi- 



4. Flustra membranaceo-truneata, Smitt, Mehavn, 2 /t — 3 A- 



5. FZwsfra &«W<?ei, Busk, Arno (Vestfjord), 300—400 m., Vi- 



6. jF7».--fm barleei, Busk, Rost II, 150 m., 25 A 1899, Vi- 



7. Flustra abyssicola, M. Sars, on a little stone, Balstad, 150 m., Vi- 



8. Bugula murrayana, Johnst., the typical form, from the „skjaergaard" outside Bergen, Vi- 



9. Schizoporella sinuosa, Busk, Svolvser, 50—70 m., aperture of the zooecium, 83 /i- 



10. Schizoporella sinuosa, Busk, Digermulen, 100 — 150 m., operculum. 83 /i. 



11. Membranipora minax, Busk, Moskenstrommen. mandible, 83 /i. 

 12 — 14. Excitant sineera, Smitt, Nordkap, 1894. 



12. Mandible, 83 /,. 



13. Operculum, 83 /i. 



14. Zooecium, lateral view, r. rosetplate, h, hole, 17 /i- 



15. Porella lasvis, Plem., The Trondhjem Fiord, l /i- 



16. Porella saccata, Busk, Nordkap, 'A. 



17. Escharopsis rosacea. Busk, Moskenstrommen. \\. 



18. Escharoides coceinea, Abildgaakd, Solsvik in the Bergen „skjsergaard", mandible, 83 A- 



19. Escharoides jacksoni, Waters, Kvsenangen II, mandible, 83 /i. 



20. Retepora wallichiana, Busk, young colony, Balstad, 2 /,— s /i. 

 21 — 24. Cellepora nodulosa, Lorenz. 



21. Colony from Mehavn (Finmarken), 2 /i — 3 A- 



22. Colony from the Norwegian North Atl. Exp., St. 273, l / u 



23. An operculum of a colony from the Joke] Fiord III, 100 m., 83 /i. 



24. A mandible of a colony from the .lokel Fiord III. 100 m., 8S /i. 



25. Cellepora inerassata, Smitt, Ilammcrfest, Vi- 

 26 — 29. Cellepora ventricosa, Lobenz. 



26. Colony from Breisund (Finmarken), 30 — 40 m., Vi- 



27. An operculum of the same colony, 83 /i 



28. Mandible of oral avicularium, 83 /i. 



29. Mandible of a spatulate avicularium. " ,. 



30. Tubulipora lileacea, Pallas, Solsvik in the Bergen „sk,ja?rgaard", '-/i _ 3 A- 



31. Tubulipora sp (? penieiUata, Fabr.), Mehavn (Finmarken), 2 A — 3 A- 



32. Idmonea atlantica, Porb., Hustadviken, outside Romsdals amt, 1 /i. 



33. Horttcra lichenoides, Pontop., the Porsanger Fiord, 200 m., Vi- 



34. Domopora stellata, Goldf., the Malangen Fiord, 100 — 200 m., a /i — 3 A- 



35. Alcyonidium disciforme, Smitt, the Lyngen Fiord III, the border a little ruptured, 2 /i — 3 A- 



36. Bowerbanlcia imbricata, Adams, The Norw. North Atl. Exp., st. 343, Vi- 

 37 — 3S. Flttstrella corincalato, Smitt, Svolvaer (Lofoten), -' ,. 



37. Zooecia, 27 A- 



38. Spine of the same colony, "A- 



