Plate X. 



Fig. i. 



2. 



3- 

 4- 



5- 



6. 



- 9- 



- ID. 



- ii. 



- 12. 



13- 

 14. 



- 18. 



- 19- 



20. 



- 21. 



22. 



- 23. 



- 24. 



- 25. 



26. 



- 27. 



- 28. 



- 29. 



- 30. 



Valve of pedicellaria of Porocidaris pzirpztrata, 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 - Phyllacanthiis imperialis, 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 umbraculum, 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 



16. small 



17. 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 tiibaria, Obj. II. Oc. I. 



umbracultun,- 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, 



- Schisocidaris 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. 



