Tlaik 10. 



1-9. Centrocidaris Doederleini A. Ag. 



1. Small globiferous pedicellariii. x 55. 



2. Interior view of valve of same pedicellaria. x li'O. 



3. Primary spine. Nat. size. 



4. Base of same spine, x 5. 



5. Tip of same spine, x 5. 



6. End view of same tip. x 5. 



7. Actinal primary spine, x 16. 



8. Interambulacral secondary spine, x 23. 



9. Ambulacral secondary spine, x 23. 



10-21. Aporocidaris fragilis A. Ag. ami Clark. 



10. Interior view of valve of pedicellaria. x 55. 



11. Side view of similar valve. x 55. 



i'J. Interior view of valve of pedicellaria. x 55. 



I-'!. Side view of similar valve, x 55. 



11. Trimary spine, x 5. 



15. Actinal primary .spine. x 5. 



10. Side view of smallest actinal primary spiue. x 11. 



17. Abactinal view of same sjiine. x 11. 



IS. Secondary spine. x 11. 



19. Actinostomal miliary, x 11. 



20. Side view of actinostomal miliary, x 11. 



21. Abactinal miliary, x 11. 



22-25. Goniocidaria biserialis Dod. 



22. Interior view of valve of globiferous pedicellaria. x 55. 

 2.'). Side view of similar valve, x 55. 



24, 25. Valves of small pedicellaria;. x 55. 



2G. Goniocidaris mikado Dud. 



26. Valve of small pedicellaria. x 65. 



27-31. Goniocidaris clypeata Dod. 



27. Valve of peculiar globiferous pedicellaria. x 55. 



28. Valve of peculiar globiferous pedicellaria. x 55. 



29. Valve of normal globiferous pedicellaria. x 55. 



30. 31. Valves of small pedicellarise. x 55. 



