Plate XXL 



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



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



-; — — - Tripneustes escjilentus. Obj. II. Oc. o. 



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



c. — — ophicephalous — - Pseudoboletia iimcnlata. Obj. II. Oc. I. 



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



-, — — — - Gyntnechinus darnleyensis. (-)bj II. Oc. I. 



8. — — — - Pseudocentrotus depressus. Obj. o. Oc. o. 



_g. ___ _- — — Obj. II. Oc. o. 



lo. — — — — - Psammechiiius variegalus. Obj. II. Oc. o. 



II. — — — — - Gytnnechinus- Robillardi^ from the inside. Obj. II. Oc. I. 



— 12. Spicules of Sphcerechinus granularis. Obj. V. Oc. III. 



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



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



Obj. V. Oc.o. 



— 15. Valve of a tridentate pedicellaria of Pseudoceiitrotus depressus. Obj. II. Oc.o. 

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



17. — — — — - Pseudoboletia inaculata^ small form. Obj. o. Oc. I. 



— 18. 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. \. Oc. III. 



— 21. Spicules of Toxopneustes pileolus; a. from globiferous pedicellaria', b. from tube feet, c. from 



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



— 22. \'alve of an ophicephalous pedicellaria of Tripneustes esc?ilentus. Obj. II. Oc. I. 



— 23. Spicules from pedicellariae of Gyinnechimis darnleyensis. Obj. V. Oc. III. 



— 24. — - Gymnechijius Robillardi; a. from pedicellariae, 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, \ixr. Eleniingii. Obj. \'. 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 iJc/z/V/^j- ^/<?.rr7;/^r/. Obj. II. Oc. I. 



— 28. Spicules from pedicellarise of Psammechinus verruculatus. Obj. V. Oc. III. 



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



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



— 31. — - globiferous pedicellaria of Psammechinus variegattis\ a developmental series. 



Obj. V. Oc. III. 



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



— 33- — °^ Tripneustes esculentus; a. from globiferous pedicellarice, b. from tube feet, c. d. iwnw 



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 darttleyensis. Obj. II. Oc. III. 



— 37. — — — — - Sphcerechinus granularis^ from the inside. (_)bj. II. Oc. o. 



— 38. — — — — - Psammechinus variegatus, . - — (_)bj. II. Oc. I. 



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



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



— 41. — tridentate — - Toxopneustes pileolus. (^bj o. ( )c. o. 



