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 affinis (U. S. F. C.) ; a. primary actinal spine, 3/i. b. primary abactinal spine, 7p 



— 3. Actinal primary spine of Dorocidaris papillata. '/i. 

 A — — - - Stereocidaris ingolfiana. ^/j. 



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



— 6. Valve of a .small globiferons pedicellaria of Stereocidaris canaliculata, from the side. Obj. II. Oc. I. 



— 7. Globiferons pedicellaria of G^«0(r/rf(7r;j-;«rtc«/(7^rt; shows the double poison gland. Obj. II. Oc. I. 



— 8. Valve of a large globiferons pedicellaria of Stereocidaris canalicttlata^ from the side. Obj. II. Oc. I. 



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

 10. Primår}' abactinal spine of Stereocidaris ingolfiana. '/j. 



— II. Valve of a large globiferons pedicellaria of Stereocid. ingolfiana^ from the side. Obj. II. Oc. I. 



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



1-5. - — - — — from the side. Obj. 00. Oc. o. 



14. Secondarv 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 globiferons pedicellaria of Stereocidaris ingolfiana. Obj. II. Oc. o. 



— 17. Actinal spine of Hypsiech. coronatus. Obj. o. O c. 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 globiferons pedicellaria of Stereocid. ingolfiana. Obj. V. Oc. I. 

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



— 23. — - — — small globiferons pedicellaria of Stcrocid. ingolfiana. The two onter- 



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



— 24—25. Ambulacral and interambulacral area of Hypsiechinus coronatus. t/'i- The sutures of the 



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



— 26. Point of a valve of a large globiferons 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 globiferons pedicellaria of Stereocid. ingolfiajia^ 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 incerta. Obj. A A. Oc. III. (Zeiss.) 



— 32. _ - - large globiferous pedicellaria of 5"ifi?r^c«'rf. <r«M«//«^/rt'if<7, from the inside. Obj.II. Oc. I. 



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



— 34. Valve of small globiferons pedicellaria of Stereocid. Mortensem\ 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 pediceharia of Stereocid. ingolfiana., from the inside. Obj. II. Oc. I. 

 ^37. — - large — — - Acanthocidaris ciirvatispinis ., from the inside. 



Obj. II. Oc. I. 



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



