M 



■m :■ ,*-^ 



23 



Tab. VI, 



Fig. 9. 



— 10. 



— 11. 



— 12. 



— 13. 



— 14. 



— 15. 



— 16. 



— 17. 



— 18. 

 Tab. VII. Fig. 1. 



— 2. 



— 3. 



— 4. 



— 5. 



— 6. 



— 9. 



— 10. 



— 11. 



— 12. 



— 13. 



— 14. 



— 15. 



— 16. 



— 17. 



— 18. 



— 19. 



— 20. 



— 21. 



Myxilla grisea. 

 Binalda uberrima. 

 Beniera infundibuliformis . 

 Henter a membranacea. 

 Suberites incrustans. 

 Seler ilia arctica. 

 Sclerilla dura. 

 Desmacidon arcticum. 

 Desmacidon nucleus. 

 Binalda uberrima. 

 Esperia bihamatifera. 



do. do. 



do. do. 



do. do. 



do. do. 



Thecophora semisuberites. a, b, c, Over- 

 gangsformer fra Th. elongate^ Marenz, 

 til Th. semisuberites d, e\ f) Th. ibla, 

 W. Thomson. 

 Cladorhiza abyssicola. 

 Desmacidon giganteum. 

 Cladorhiza abyssicola. 

 do. do. 



do. do. 



do. do. 



do. do. 



Esperia bihamatifera. 



do. do. 



Tethya cranium. 



do. do. var. infrequens, Grjen- 



nemsnit. 



Tethya cranium var. infrequens, et Stykke 

 af Overfladen. 

 Thenea muricata. 

 Hyalonema arcticum. 

 do. do. 



Indleveret 23. Septbr. 1884. 



PL VI, fig. 



PI. VII, fig. 



9. 

 10, 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 



1. 



2. 



.3. 



4. 



5. 



6. 



— 7. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 



18. 



19. 

 20. 

 21. 



Myxilla grisea. 

 Binalda uberrima. 

 Beniera infunclibidiformis. 

 Beniera membranacea. 

 Suberites incrustans. 

 Sclerilla arctica. 

 Sclerilla dura. 

 Desmacidon arcticum. 

 Desmacidon nucleus. 

 Binalda uberrima. 

 Esperia bihamatifera. 



do. do. 



do. do. 



do. do. 



do. do. 



Thecophora semisuberites. a, b, c, d, e, Trans- 

 ition-forms from Th. elongata, Marenz. 

 /, Th. ibla, W. Thomson. 



Cladorhiza abyssicola. 

 Desmacidon giganteum. 

 Cladorhiza abyssicola 



do. do. 



do. do. 



do. do. 



do. do. 



Esperia bihamatifera. 



do. do. 



Tethya cranium. 



do. do. Var. infrequens ; sectional 



aspect. 



Tethya cranium Var. infrequens. As- 

 pect of a portion of the surface. 

 Thenea muricata. 

 Hyalonema arcticum. 



do. do. 



Received 23 rd September 1884. 



