Plate XXL 



Fig. i. Valve of a tridentate pedicellaria of Pseudoboletia maculata. Obj. o. Oc. I. 



— 2. — — - Psammechinus verruculatus. Obj. II. Oc. I. 



— 3. — - Tripiieustes esculentus. Obj. II. Oc. o. 



— 4. - Gymnechinus Robillardi\ from the side. Obj. II. Oc. I. 



— 5. ophicephalous — - Pseudoboletia maculata. Obj. II. Oc. I. 



— 6. tridentate - Anthocidaris homalostoma. Obj. II. Oc. o. 



— 7. — - Gymnechinus darnleyeusis. Obj II. Oc. I. 



— 8. — - Pseudocentrotus depress us. Obj. o. Oc. o. 



— 9. - Obj. II. Oc.o. 



— 10. - Psammechinus variegatus. Obj. II. Oc.o. 



— 11. - Gymnechinus Robillardi, from the inside. Obj. II. Oc. I. 



— 12. Spicules of Sph&rechinus granularis. Obj. V. Oc. III. 



— 13. Valve of a globiferons pedicellaria of Toxopneustes pileolus. Obj. II. Oc. o. 



— 14. Spicules of Pseudocentrotus depressus; a. from the tube feet, b. from the pedicellarise. 



Obj. V Oc.o. 



— 15. Valve of a tridentate pedicellaria of Pseudocentrotus depress/is. Obj. II. Oc.o. 



— 16. — - Tripiieustes esculentus. Obj. II. Oc. o. 



— 17. - Pseudoboletia maculata, small form. Obj. o. Oc. I. 



— iS. Plates from the buccal membrane and the gills of Echinus Alexandri\ a. from the buccal 



membrane inside of the buccal plates, b. c. from the gills. Obj. II. Oc. I. 



— 19. Piece of the stalk of a pedicellaria of Echinus Alexandri. Obj. V. Oc. I. 



— 20. — edge of a tridentate pedicellaria of Ech. Alexandri. Obj. V. Oc. III. 



• 21. Spicules of Toxopneustes pileolus; a. from globiferons pedicellaria;, b. from tube feet, c. from 

 the buccal membrane. Obj. V. Oc. I. 



— 22. Valve of an ophicephalous pedicellaria of Tripneustes esculentus. Obj. II. Oc. I. 



— 23. Spicules from pedicellarise of Gymnechinus darnleyensis. Obj. V. Oc. III. 



24. - Gymnechinus Robillardi; a. from pedicellarise, Obj. V. Oc. I, b. from the buccal 

 membrane. Obj. II. Oc. I. 



- 25. Piece of the edge of a tridentate pedicellaria of Echinus acutus, var. Flemingii. Obj. V. Oc. III. 



- 26. — stalk of a pedicellaria of Echinus acutus, var. Flemingii. Obj. V. Oc. I. 



- 27. Plate from the buccal membrane, outside of the buccal plates, of Echinus Alexandri. Obj. II. Oc. I. 



— 28. Spicules fiom pedicellaria^ of Psammechinus verruculatus. Obj. V. Oc. III. 



— 29. - — - Pseudoboletia maculata. Obj. V. Oc. I. 



— 30. - tube feet of Anthocidaris homalostoma. Obj. V. Oc. o. 



31. - globiferous pedicellaria of Psammechinus variegatus; a developmental series. 

 Obj. V. Oc. III. 



— 32. - tube feet of Parasalenia gratiosa. Obj. V. Oc. I. 



- 33. — of Tripneustes esculentus; a. from globiferous pedicellaria;, b. from tube feet, c. d. from 



the buccal membrane. Obj. V. Oc. I. 



34. Valve of a tridentate pedicellaria of Sphcerechinus granularis. Obj. o. Oc. I. 



— 35. globiferous - — from the side. Obj. II. Oc. o. 



— 36. — — - Gymnechinus darnleyensis. Obj. II. Oc. III. 



— 37. - Spharechinus granularis, from the inside. Obj. II. Oc. o. 



— 38. - Psammechinus variegatus, - - Obj. II. Oc. I. 



— 39. - Tripneustes esculentus. Obj. II. Oc. I. 



- 40. - Psammechinus variegatus, from the side. Obj. II. Oc. I. 



— 41. — tridentate - Toxopneustes pileolus. Obj o. Oc. o. 



