Plate VIII. 



Fig. i. Tube foot of Dorocidaris papillata, shows the arrangement of the spicules. Obj. o. Oc. o. 



2. a. b. Spines of Cidaris a/finis (U. S. F. C.) ; a. primary actinal spine, 3/ t . b. primary abactinal spine, 1 / I . 



— 3. Actinal primary spine of Dorocidaris papillata. I j I . 

 4. — - - Stereocidaris ingolfiana. 2 / r . 



— 5. Secondary abactinal spine of Hypsiechinus coronatus. Obj. II. Oc. o. 



— 6. Valve of a small globiferous pedicellaria of Stereocidaris cana licit lata, from the side. Obj. II. Oc. I. 



— 7. Globiferous pedicellaria of Genocidaris maculata ; shows the double poison gland. Obj. II. Oc. I. 

 8. Valve of a large globiferous pedicellaria of Stereocidaris canalicnlata, from the side. Obj. II. Oc. I. 



— 9. Point of a primary abactinal spine of Hypsiechinus coronatus. Obj. II. Oc. o. 

 10. Primary abactinal spine of Stereocidaris ingolfiana. l l 1 . 



— 11. Valve of a large globiferous pedicellaria of Stereocid. ingolfiana, from the side. Obj. II. Oc. I. 



— 12. Spine from the peristome of Dorocid. papillata. Obj. 00. Oc. o. 



13. — - - from the side. Obj. 00. Oc. o. 



— 14. Secondary spine with ampulla from the abactinal side of Dorocid. papillata. Obj. o. Oc. o. 



— 15. Piece of an actinal spine of Hypsiech. coronatus. Obj. II. Oc. III. 



— 16. Large globiferous pedicellaria of Stereocidaris ingolfiana. Obj. II. Oc. o. 



— 17. Actinal spine of Hypsiech. coronatus. Obj. o. Oc. o. 



— 18. Piece of an abactinal primary spine of Hypsiech. coronatus. Obj. II. Oc. o. 



— 19. Secondary spine of Stereocidaris ingolfiana. Obj. 00. Oc. o. 



— 20. Spine from the peristome of — — Obj. o. Oc. o. 



— 21. Point of a valve of a small globiferous pedicellaria of Stereocid. ingolfiana. Obj. V. Oc. I. 



— 22. — — — pedicellaria of Porocidaris purpurata. Obj. V. Oc. o. 



— 23. — - small globiferous pedicellaria of Sterocid. ingolfiana. The two outer- 



most teeth coalesced in the point. Obj. V. Oc. III. 

 24—25. x^mbulacral and iuterambulacral area of Hypsiechinus coronatus. +/p The sutures of the 

 ambulacral area are not so distinct in the animal, as here in the figure. 



- 26. Point of a valve of a large globiferous pedicellaria of Stereocid. ingolfiana. Obj. V. Oc. o. 



— 27. — - — - — - Dorocid. papillata. Obj. V Oc. o. 

 28. Small globiferous pedicellaria of Stereocid. ingolfiana. Obj. II. Oc. o. 



- 29. Valve of a large globiferous pedicellaria of Stereocid. ingolfiana, from the inside. Obj. II. Oc. I. 



30. — - - small - — - side. Obj. II. Oc. I. 



(comp. Fig. 21.) 



31. Valve of a globiferous pedicellaria of Stereocidaris iucerta. Obj. A A. Oc. III. (Zeiss.) 



32. — - - large globiferous pedicellaria of Stereocid. canaliculata, from the inside. Obj. II. Oc. I. 



— 33. Tridentate pedicellaria of Arbacina forbesiana. Obj. II. Oc. I. 



34. Valve of small globiferous pedicellaria of Stereocid. Morteuseui, from the inside. A A. Oc. I. (Zeiss.) 



- 35. — - large - sp. , from the inside. (Challenger. St. 156. 



comp. p. 26.) Obj. II. Oc. o. 



- 36. Valve of small globiferous pedicellaria of Stereocid. ingolfiana, from the inside. Obj. II. Oc. I. 



- 37. — - large - Acanthocidaris citrvatispiuis , from the inside. 



Obj. II. Oc. I. 



— 38. Ophicephalous pedicellaria of Hypsiechinus coronatus. Obj. II. Oc. o. 



