Plate V. 



Fig. i. Pourtalesia Wandeli, abactinal side. 2 / t . 



actinal side. (Not fully to be relied upon as regards the limits of the 

 plates.) Vi- 

 actinal side. 2 / z . 



abactinal side. ^/j. (The upper plates of ambulacra I and V and of inter- 

 ambulacrum 5 not quite correctly made out here. Comp. PI. VIII. Fig. 2.) 

 5. side view. 2 / t . 



6. actinal side. Ii8 /!. 



7. abactinal side. I / I . 



8. Aeropsis rostrata, actinal side. 2 /i- 



9. abactinal side. 2 /^ 



10. side view. 1 J I . 



ii. Pourtalesia Wandeli, side view, '/i- 



- 12. '/!. 



13- Jeffreysi, i/,. 



14. abactinal side. I / I . 



15. Aeropsis rostrata, side view. 2 /i- 



16. Pourtalesia Jeffreysi, abactinal side. J /i- 



- 17. actinal side. I / 1 . 



- 18. side view. I / I . 



19. abactinal side. I / I 



20. Aeropsis rostrata, abactinal side. 1 / I . 



- 2i. Pourtalesia Jeffreysi, actinal side. 1 / l . 



22. Aeropsis rostrata, actinal side, '/i- 



23. Pourtalesia Jeffreysi, side view. I / I . , 



