EXPLANATION OF PLATE XXII. 



Figs. 1-9. Eujpledella regalis. F. E. Sch. 



Fig. 1. One-half of the upper end with sieve-plate and marginal collar. 

 Nat. size. 



Fig. 2. Portion of the central part of the body, both the external and 

 internal surface are visible. Nat. size. 



Fio-. 3. A verticil of floricom branch-rays, seen from above, x 500. 



Fig. 4. Lateral view of a verticil of floricom branch-rays. x 500. 



Fig. 5. Sigmatocom. x 500. 



Fig. 6. Oxyhexaster. x 300. 



Fig. 7. Robust oxypentactine from the annular membrane of a parietal 

 oscule. X 100. 



Fig. 8. Part of the terminal sieve-plate and marginal collar, seen from 

 above. Nat. size. 



Fig. 9. Lower end of a basal club-anchor-spicule. x 100. 



Figs. 10-18. Eegadrella decora. F. E. Sch. 

 Fig. 10. Basal part of the tubular body. Nat. size. 



Fig. 11. Arrangement of the spicules in a transverse section of the body- 

 wall, vertical to the surface. x 100 (combined figure). 



Fig. 12. A verticil of floricom branch -rays seen from above. x 300. 

 Fig. 13. Lateral view of a single branch-ray of a floricom. x 500. 

 Fig. 14. Lateral view of a floricom with two branch-ray verticils, x 300. 

 Fig. 15. Surface view of an oxystauraster. x 300. 

 Figs. 16 and 17. Lateral view of oxystaurasters. x 300. 

 Fig. 18. Cui'ved, macrosclere diactine. x 10. 



