Plate X. 



Fig. i. 



— 2. 



— 3- 



— 4- 



— 5- 



— 6. 



— 7- 



— 8. 



- io. 



- ii. 



- 12. 



- J 3- 



- 14. 



- !5- 

 16. 



- i7- 



- 18. 

 19. 



- 20. 



- 21. 



- 22. 



- 23. 



- 24. 



- 25. 



- 26. 



- 27. 



- 28. 



29. 



- 3°- 



- 3 1 - 



Valve of pedicellaria of Porocidaris purpurata, from the side. Obj. II. Oc. o. 



Piece of the same, from the inside. Obj. V. Oc. o. 



Valve of a large globiferous pedicellaria of Stereocidaris nutrix, from the side. Obj. II. Oc. o. 



— — — - - the inside. Obj. II. Oc.o. 



— of pedicellaria of Porocidaris purpurata, from the inside, the lower part. Obj. II. Oc. o. 



— - globiferous pedicellaria of Discocidaris (?) serrata, from the inside. Obj. II. Oc. III. 



— - — — - the side. Obj. II. Oc. III. 



— - tridentate - Phyllacanthus imperialism from the side. Obj. A A. Oc. I 

 (Zeiss.) 



Valve of tridentate - Acanthocidaris curvatispinis, from the side. Obj. A A. Oc. I. 



(Zeiss.) 

 Valve of a large globiferous pedicellaria (a smaller specimen) of Tretocidaris spinosa, from 



the inside. Obj. II. Oc. o. 



of Tretocidaris spinosa, from the side. Obj. II. Oc. o. 



- Stereocidaris nutrix, - the inside. Obj. II. Oc. o. 



- Goniocidaris umbracuhim, from the side. Obj. II. Oc. I. 



- Stereocidaris nutrix, from the side. Obj. II. Oc. o. 



- Chondrocidaris gigantea, from the side. Obj. II. Oc. I. 



- Tretocidaris spinosa, from the side. Obj. II. Oc. o. 



- Stephanocidaris bispinosa (see Appendix), from the 



Valve of a large globiferous 



— — small 



— — large 



— — small — 



large 



inside. Obj. II. Oc. o. 

 Valve of a large globiferous 



Stephanocidaris bracteata, from the side. Obj. II. Oc. I. 

 Chondrocidaris gigantea, from the inside. Obj. II. Oc. I. 

 Goniocidaris tubaria, - Obj. II. Oc. I. 



timbractilum,- Obj. II. Oc. I. 



Tretocidaris annulata, - Obj. II. Oc.o. 



Bartletti, from the side. Obj. A A. Oc. VI. 



(Zeiss.) 

 Valve of a small 



(Zeiss.) 

 Valve of a large 

 — small 

 Oc. VI. (Zeiss.) 

 Valve of a large 



Oc. VI. (Zeiss.) 

 Valve of a large 



Oc. III. 

 Valve of a small 

 large 

 Oc. VI. (Zeiss.) 

 Valve of a large 



Stereocidaris nutrix, 



Obj. A A. Oc.HI. 



- Schizocidaris assimilis, - — Obj. II. Oc. III. 



- Chondrocidaris gigantea, from the inside. Obj. AA. 



Petalocidaris florigera, 

 Schizocidaris assimilis, 



Obj. A A. 

 Obj. II. 



Petalocidaris florigera, from the inside. Obj. II. Oc. I. 

 Tretocidaris Bartletti, — Obj. A A. 



annulata, 



the side. Obj. II. Oc. o. 



