EXPLANATION OF PLATE II. 



Fio-s. l-14i. Hiialonema aculeatiini. F. E. Scb. 



Figs. 1-4. Foiir differently sized specimens in lateral view. Nat. size. 

 Fig. 5. Arrangement of the spicules in a section vertical to the surface. 

 X 50 (combined figure). 



Figs. 6 and 7, Dermal pinnies. x oOO. 



Fig. 8. Micro-oxyhexactine. x ;100. 



Fig. 9. Macramphidiscs. x .300. 



Figs. 10-, 11 and 12. Micramphidiscs. x 800. 



Fig. 13. Ambuncinate. x 200. 



Fig. li. Lower end of an anchor-spicule. x 300. 



Figs. 15-22. Eijalonfim heideri. F. E. Sch. 



Fig. L5. The only known specimen. Nat. size. 



Fig. 16. Arrangement of the spicules in a section vertical to the surface. 

 X 50 (combined figure). 



Fig. 17. Micro-oxyhexactine. x 300. 

 Figs. 18 and 19. Dermal pinules. x 3(>0. 

 Fig. 20. Macramphidisc. x 300. 

 Fig. 21. Mesamphidisc. x 300. 

 Fig. 22. Ambuncinate. x 300. 



Figs. 23-30. Hi/aloneyma piruvi. F. E. Sch. 



Figs. 23-25. Three differently sized specimens in lateral view. Nat. size. 



Fig. 2t). Arrangement of the spicules in a section vertical to the surface, 

 x 5(1 (combined figure). 



Fig. 27. Micro-oxyhexactine. x 300. 



Fig. 28. Dermal pinule. x 800. 



Fig. 29. Macramphidisc. x 300. 



Fig. 30. Micramphidisc. x 800. 



