310 



THE VOYAGE OF H.M.S. CHALLENGER. 



Lovenia suhcarinata,GYiij (figs. 7-9), p. 175. 



Fig. 7. Seen from the abactinal side. 

 „ 8. Same, seen from the actinal side. 

 „ 9. Same, seen from the anal extremity. 



EchinoJamjxis oviformis. Gray (figs. 10, 11), p. 12.3. 



10. Seen from the abactinal surface. 



11. Same, seen from the actinal side. 

 All the figures natural size. 



PLATE XXXVIII. 



Sections of Spines (figs. 1-31), p. 14. 



17. Aspidodiadema microtuhercu- 



latum. 



18. „ „ 



19. Aspidodiadema tonsum. 



20. Encope michelini. 



21. Mellita testudinata. 



22. Clypeaster suhdepressus. 



23. Maretia planulata. 



24. Linopneustes murrayi. 



25. Argopatagus vitreus. 



26. Homolampas fulva. 



27. Phynchop>ygus p)acific\is. 



28. Linopneustes murrayi. 

 Zy. „ ,, 



30. Pourtalesia carinata. 



31. 55 55 



Fio-s. 1«, 2«, 3", &c., are sectors of the same spine section still more magnified to 

 show the structure somewhat more in detail. 



