Plate V. 



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



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



plates.) 7i- 



— 3. — — actiual side. ^j. 



— 4. — — abactinal side. '-^/j. (The ujDper 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. ^j. 



— 6. — — actinal side. '-^/i. 



— 7. — — abactinal side, '/i- 



— 8. Aeropsis rostrata, actinal side. ^/j. 



— 9. — — abactinal side. ^/j. 



— 10. — — side view, '/i- 



— II. Pourtalesia Wandeli, side view, '/i- 



— 12. - - - - -%. 



— 13- — Jeffrcysi, — — Vi- 



— 14. — — abactinal side. ^i. 



— 15. Aeropsis rostrata, side view. ^/j. 



— 16. Pourtalesia Jeffrcysi, abactinal side, '/i- 



— 17. — — actinal side. 7i- 



— 18. — — side view, '/i- 



— 19. — — abactinal side, '/i 



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



— 21. Pourtalesia Jeffrcysi, actinal side, '/i- 



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



— 23. Pourtalesia Jeffreysi, side view, '/i- 



