Plate IV. 



Stcphanocidaris bispinosa 30. Plesiodiadema antilllarum 8. 16, 29, 33, 35. PI. microtuberculatum 12. 18. 

 Aspidodiadema Jacobyi 10. 20. Diadema antillarum 28. D. Savigiiyi 37. D. saxatile 2G, 31, 34. Astro- 

 pyga radiata 9, 17. A. pulvinata 21. Chætodiadeiua granulatum 1. 4, 13, 14, 15, 24, 32. Echinothrix 

 calaniaris 7. E. diadema 23, 25, 36. Centrostephanus longispinus 2, 11. C. Rodgersii 19, 22. Mieropyga 



tuberculata 27. Cænopedina mirabilis 3, 5, 6. 



Fig. 1. Tridentate pedicellaria of Chœtodiadema granulatum. Zeiss. AA. Oc. 1. 



— 2. Valve of ophicephalous pedicellaria of Centrostephanus longispinus. Seib. Obj. II. Oc. I. 



— 3. — - globiferous pedicellaria of Cænopedina mirabilis; side view. Zeiss. D. Oc. 1. 



— 4. „Claviform" pedicellaria, small form, ot Chœtudiudema granulatum {comp. Fig. 32). Zeiss, a'. Oc. 3. 



— 5. Valve of globiferous pedicellaria of Cænopedina mirabilis; front view. Zeiss. D. Oc. 1. 



— 6. — - ophicephalous — - — — Zeiss. Apochr. 80. Comp. Oc. 4. 



— 7. Tridentate pedicellaria, small form, of Ecliinothri.v calamaris. Seib. Obj. 0. Oc. III. 



— 8. Valve of ophicephalous pedicellaria, large form, o( Plesiodiadema antillarum. Seib. Obj. II. Oc. I. 



— 9. Spicules from tube foot of Astropgga radiata. Zeiss. AA. Oc. 2. 



— 10. Valve of ophicephalous pedicellaria, small form, of Aspidodiadema Jacubgi. Zeiss. D. Oc. 1. 



— 11. — - globiferous (claviform) pedicellaria of C('ii/ro.s;i7;/u(nHs /on;/'.''/"""''- Seih. Ohj. II. Oc. 111. 



— 12. — - ophicephalous pedicellaria, small form, of l^lesiodiadema micrululierculatuni. Zeiss. U. 



Oc. 1. 



— 13. Spicules oi Chœtodiadema granulatum; a. from abactinal, h. from buccal tuhefoot. Zeiss. D. Oc. 1. 



— 14. Actinal sjjine of Chœlodiadcma granulatum. "/i. 



— 15. Spicules of Cluetudiadema granulatum; from actinal tube foot. Zeiss. D. Oc. 1. 



— 16. Valve of triphyllous pedicellaria of Plesiodiadema antillarum. Seib. Ohj. 11. Oc. III. 



— 17. — - — — - Astropgga radiata. Zeiss. D. Oc. 1. 



— 18. — - — — - Plesiodiadema microtuberculatum. Zeiss. Apoclir. 8-0. Comp. 



Oc. 4. 



— 19. Valve of globiferous pedicellaria of Centrostephanus Rodgersii. Seib. Obj. II. Oc. 0. 



— 20. — - triphyllous - Aspidodiadema .lacobgi. Zeiss. D. Oc. 1. 



— 21. — - — — - Astropgga pulvinata. Zeiss. D. Oc. 1. 



— 22. — - — — - Centrostephanus Rodgersii. Seib. Obj II. Oc. I. 



— 23. — - — — - [ichinothri.1- diadema. Zeiss. Apochr. 80. Comp. Oc. 4. 



— 24. — - — — - Chœtodiadema granulatum. Zeiss. D. Oc. 1. 



— 25. Tridentate pedicellaria, small form, of Echinotliri.v diadema. Zeiss. AA. Oc. 1. 



— 26. Valve of triphyllous pedicellaria of Diadema sa.vatile. D. Oc. 2. 



— 27. — - - — - Micropgga tuberculata. Zeiss. D. Oc. 1. 



— 28. Tridentate pedicellaria, large form, of Diadema antillarum. Zeiss. Apochr. 160. Comp. Oc. 2. 



— 29. Valve of tridentate pedicellaria of Plesiodiadema antillarum. Zeiss. AA. Oc. 3. 

 .'SO. — - - — - Stcphanocidaris bispinosa. Zeiss. AA. Oc. 2. 



31. Stalk of pedicellaria of Diadema sa.ratile. Zeiss. A. Oc. 3. 



32. „Claviform" pedicellaria of Chœtodiadema granulatum. Zeiss, a'. Oc. 3. (Comp. Fig. 4.) 



— 33. — — - Plesiodiadema antillarum. Zeiss. AA. Oc. 2. 



— 34. Stalk of pedicellaria of Diadema sa.iatile. Zeiss. AA. Oc. 2. 



— 35. Valve of triphyllous pedicellaria of Plesiodiadenui antillarum {„Aspidod. microtubcrculalum" . 



Chall. Macio.). .Seib. Obj. II. Oc. I. 



— 36. Valve of tridentate pedicellaria, small form, of Echinothri.v diadema. Zeiss. AA. Oc. 3. 



— 37. Tridentate pedicellaria, small form, of Diadema Sanigngi. Zeiss. Apochr. 160. Oc. 2. 



