Plate 23. 



1-33. Podophora atrata AgasB. 

 1-33 Spines. 



1. Spine, from the actinal system near tlie teeth. 



2. Spine, near the actinal system, from the odd anterior ambulacrum, 



3. Spine, ^ lower surface, near the actinal system, from the left anterior interambu- 



lacrum. 



4. Spine, y upper surface, near the actinal system, from the left anterior interambu- 



lacrum. 



5. Spine, J profile, near the actinal system, from the left anterior interambulacrum. 



6. Spine, ■^ upper surface, from the actinal side of the ambitus, from the left posterior 



interambulacrum. 



7. Spine, lower surface, from the actinal side of the ambitus, from the left posterior 



interambulacrum. 



8. Spine, profile, from the actinal side of the ambitus, from the left posterior inter- 



J ambulacrum. 



9. Spine, ^ upper surface, at the ambitus, from the right anterior ambulacrum. 



10. Spine, > lower surface, at the ambitus, from the right anterior ambulacrum. 



11. Spine, J profile, at the ambitus, from the right anterior ambulacrum. 

 These larger radioles vary in length from 15-20 mm. 



12. Spine, ] upper surface, at the ambitus, from the left posterior interambulacrum. 



13. Spine, ?■ lower surface, at the ambitus, from the left posterior interambulacrum. 



14. Spine,J profile, at the ambitus, from the left posterior interambulacrum. 



15. Spine, ] lower surface, from the abactinal side, near the ambitus, from the right pos- 



terior ambulacrum. 



16. Spine, I top view, from the abactinal side, near the ambitus, from the right posterior 



ambulacrum. 



17. Spine, profile, from the abactinal side, near the ambitus, from the right posterior 



ambulacrum. 



18. Spine, ^ upper surface, from the abactinal side, near the ambitus, from the right ante- 



rior interambulacrum. 



19. Spine, I lower surface, from the abactinal side, near the ambitus, from the right ante- 



rior interambulacrum. 



20. Spine, profile, from the abactinal side, near the ambitus, from the right anterior 



interambulacrum. 



21. Spine, ^ lower surface, from the abactinal side, near the ambitus, from the right ante- 



rior interambulacrum. 



22. Spine, I top view, from the abactinal side, near the ambitus, from the right anterior 



interambulacrum. 



23. Spine, profile, from the abactinal side, near the ambitus, from the right anterior 



interauibulacrum. 



