Plate V. 



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



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



plates.) J /i- 



— 3. — — actinal side. 2 / x . 



— 4. — abactinal side. I,8 / I . (The upper plates of ambulacra I and V and of inter- 



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



— 5. — — side view. 2 / x . 



— 6. — — actinal side. I-8 / x . 



— 7. — — abactinal side. I / I . 



— 8. Aeropsis rostrata, actinal side. 2 / x . 



— 9. — — abactinal side. 2 / x . 



— 10. — — side view. I / I . 



— 11. Pourtalesia Wandeli, side view. I / I . 



— 12. - - - - 8 /i. 



— 13. Jeffreysi, — — »/i- 



— 14. — — abactinal side. I / I . 



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



— 16. Pourtalesia Jeffreysi, abactinal side. : /i- 



— 17. — actinal side. r / x . 



— 18. — side view. : /i- 



— 19. — abactinal side. I / I 



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



— 21. Pourtalesia Jeffreysi, actinal side. I / I . 



— 22. Aeropsis rostrata, actinal side. 1 / I . 



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



