Plate U. 



1-48. Podophora pedifera Agass. 

 1-48. Spines, from a specimen 82 mm. in diameter. 



1. Spines seen in profile, taken from the left posterior ambulacrum towards the apical 



system. 



2. Spine, from a poriferous plate of the buccal membrane. 



3. Spine, from the first plate at the actinal system of the odd anterior ambulacrum. 



4. Spine, from the second plate, of the left anterior interambulacrum. 



5. Spine, from the third plate, of the left anterior interambulacrum. 



6. Spine, from the third plate, in the odd anterior ambulacrum. 



7. The profile of the same spine as 6. 



8. Spine, from the fourth plate of the left anterior ambulacrum. 



9. Spine, f upper surface ■» 



^„ _ . "i , . f- from the fourth plate of the odd anterior ambulacrum. 



10. Spine, (. lower surface ) 



11. Spine, lower surface "l at the ambitus. 



12. Spine, upper surface ^ from the fifth plate of the odd anterior ambulacrum. 



13. Spine, profile J these larger radicles vary in length from 15 18 mm. 



14. Spine, lower surface"] 



15. Spine, upper surface |. from the sixth plate of the odd anterior ambulacrum. 



16. Spine, profile J 



17. Spine, lower surface \ 



. „ ^, . „ f from the seventh plate of the odd anterior ambulacrum. 



18. Spine, upper surface > 



19. Spine, lower surface ~| 



20. Spine, upper surface > from the eighth plate of the odd anterior ambulacrum. 



21. Spine, profile J 



22. Spine, lower surface 



23. Spine, top view ^ from the tenth plate of the left anterior interambulacrum. 



24. Spine, profile 



25. Spine, lower surface 



26. Spine, top view 



27. Spine, profile 



28. Spine, lower surface 



29. Spine, top view 



30. Spine, profile 



31. Spine, lower surface " 



32. Spine, upper surface 



33. Spine, profile 

 The plates from which the spine is taken are counted from the actinal system 



34. Spine, lower surface 



35. Spine, upper surface \~ from the ocular and genital plates 



36. Spine, profile 



from the eleventh plate of the left anterior interambulacrum. 



from the twelfth plate of the odd anterior ambulacrum. 



>. from the thirteenth plate of the odd anterior ambulacrum. 



