Plate VII. 



Fig. i 20. Hypsieckinus coronatus. 

 i. Test of ?. 4/j. 

 24. Test of ?. V'i- 

 5. Specimen with young. 3/ t . 



68. Three developmental stages, the more important skeletal parts begun. Obj. II. Oc. 1. 

 9. Apical area of <?. 4/,. 



- 10. Piece of the rosette. Obj. II. Oc. III. 



n. Plate from the buccal membrane. Obj. II. Oc. I. 



12. Spicules from the gills. Obj. II. Oc. I. 



13. Spicules from tube feet. Obj. II. Oc. I. 



14. Anal plate of a young one. Obj. II. Oc. III. 



15. Calcareous plates from the buccal membrane, inside of the buccal plates. 



Obj. II. Oc. I. 

 16. Valve of triphyllous pedicellaria. Obj. II. Oc. III. 



17. Sphseridia. Obj. II. Oc. III. 



18. Valve of ophicephalous pedicellaria. Obj. II. Oc. III. 



19. - globiferous pedicellaria, from the inside. Obj. II. Oc. III. 

 _ 20. - side. Obj. II. Oc.UI. 



21. - tridentate pedicellaria of Prionechinus sagittiger. Obj. II. Oc. I. 



_ 22. - Arbacina forbesiana. Obj. II. Oc. I. 



23. - triphyllous - Trigonocidaris albida. Obj. II. Oc. III. 



24. - Genocidaris maculata. Obj. II. Oc. III. 



25. - Prionechinus sagit tiger. Obj. II. Oc. III. 



- 26. - Arbacina forbesiana. Obj. II. Oc. III. 



27. Spicules from tube foot of Trigonocidaris monolini. Obj. V. Oc. o. 



28. albida. Obj. V. Oc. o. 



- 29. Valve of globiferous pedicellaria of Prionechimis sagittiger. Obj. II. Oc. III. 



30. - Genocidaris maculata. Obj. II. Oc. III. 



31. - Trigonocidaris albida. Obj. II. Oc. III. 



32. - Arbacina forbesiana. Obj. II. Oc. III. 



