Plate V. 



Fig. I. Pourtalesia Wandeli, abactinal side. ^/i. 



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



piates.) '/i- 



— 3. — — actinal side. ^/i. 



— 4. — — abactinal side. '-^/i. (The upper piates of ambulacra I and V and of inter- 



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



— 5. — — side view. ^/i. 



— 6. — — actinal side. '-^i- 



— 7. — — abactinal side. ^j. 



— 8. Aéropsis rostrata, actinal side. ^/i. 



— 9. — — abactinal side. ^/i. 



— 10. — — side view. 7i- 



— II. Pourtalesia Wandeli, side view. 7i- 



— 12. - - - - '-Vi- 



— 13- - Jeffreysi, — — '/,. 



— 14. — — abactinal side. 7i- 



— 15. Aéropsis rostrata, side view. 7i- 



— 16. Pourtalesia Jeffreysi, abactinal side. 7i- 



— 17 — — actinal side. 7i- 



— 18. — — side view. 7i- 



— 19. — — abactinal side. 7i 



— 20. Aéropsis rostrata, abactinal side. 7i- 



— 21. Pourtalesia Jeffreysi, actinal side. 7f 



— 22. Aéropsis rostrata, actinal side. 7i- 



— 23. Potirtalcsia Jeffreysi, side view. 7i- 



