Plate VII. 



Fig. I — 20. Hypsiechinus coronatus. 



— I. Test of ?. 4/j. 



— 2—4. Test of %. '/,. 



— 5. Specimen with young. 3/,. 



— 6—8. Three developmental stages, the more important skeletal parts begun. Obj. II. Oc. I. 



— 9. Apical area of $. •i/j. 



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



— II. 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. III. 



— 21. — - tridentate pedicellaria of Prioitechinics sagittiger. Obj. II. Oc. I. 



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



— 23. — - triplnUous — - Trigonocidaris albida. Obj. II. Oc. III. 



— 24. — - — — - Genocidaris inaculata. Obj. II. Oc. III. 



— 25. — - — — - Prionechinus sagittiger. Obj. II. Oc. III. 



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



— 27. Spicules from tube foot of Trigonocidaris monoh'ni. Obj. V. Oc. o. 



— 28. — . _ _ . _ albida. Obj. V. Oc. o. 



— 29. Valve of globiferous pedicellaria of Prionechinus 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. 



