Plate XL 



4, 710. 30 Pourlalesia Jeffreysi. I, 13, 14, 1820, 23, 3437, 40, 41 P. Wandeli. 2, 3, 5, 6, 17, 21, 24, 25, 2729, 32, 4244 

 Echinosigra (Pourtalesia) paradoxa. 12, 33 P. lagzincula. n P. Tanneri. 31 /". hispida. 15, 26 .P. rosea. 16, 22, 38, 39 



Helgocystis (Pourtalesia) carinala. 



Fig. i. Pourtalesia Wandeli, rostrate pedicellaria. 7/j. 



2. Echinosigra (Pourtalesia) paradoxa, valve of tridentate pedicellaria, from the inside. I2 5/j. 



3. - ophicephalous - I2 5/ r . 



4. Pourtalesia Jeffrcysi, valve of ophicephalous pedicellaria, side view. I2 5/!. 



5. Echinosigra (Pourtalesia) paradoxa, valve of tridentate pedicellaria. I2 5/i- 



6. ophicephalous - side view. I2 5/j. 



7. Pourtalesia Jeffreysi, valve of ophicephalous pedicellaria, from the inside. "5/j. 



8. - tridentate '7S/,. 



9. rostrate pedicellaria. so/j. 



10. valve of rostrate pedicellaria, from the inside. (Comp. Fig. 30). ?/,. 



ii. Tanneri, 7/j. 



- 12. laguncula, - - ophicephalous pedicellaria. "5/j. 



- 13. Wandeli, ophicephalous pedicellaria. 7/,. 



14. valve of ophicephalous pedicellaria, side view. I2 5/!. 



15. rosea. - tridentate I2 5/i- 



16. Helgocystis (Pourtalesia) carinata, valve of globiferous pedicellaria, side view. (Comp. Fig. 22). ?%. 



- 17. Echinosigra (Pourtalesia) paradoxa, rostrate pedicellaria. ?%. 



18. Pourtalesia Wandeli, valve of ophicephalous pedicellaria. I2 5/i- 



19. - rostrate from the inside. (Comp. Fig. 23.) ?%. 



- 20. primary spine, from the inner part of the buccal cavity. (Comp. Fig. 34). 3/j. 



21. Echinosigra (Pourtalesia) paradoxa, primary spine, from the inner part of the buccal cavity. 5<y,. 



- 22. Helgocystis (Pourtalesia) carinata, valve of globiferous pedicellaria, from the inside. (Comp. 



Fig. 16). TO/,. 



- 23. Pourtalesia Wandeli, valve of rostrate pedicellarise, side view. (Comp. Fig. 19.) ?%. 



- 24. Echinosigra (Pourtalesia) paradoxa, tridentate pedicellaria. ?<>/,. 



- 25. sphseridia. I2 5/i- 



26. Pourtalesia rosea, ophicephalous pedicellaria. 7/,. 



27. Echinosigra (Pourtalesia) paradoxa, valve of rostrate pedicellaria, from the inside. I2 5/ : . 



- 28. side view. I2 5/ z . 



- 29. tridentate pedicellaria. ?<>/,. 



- 30. Pourtalesia Jeffreysi, valve of rostrate pedicellaria, side view. (Comp. Fig. 10). 7^. 



- 31. hispida, - tridentate I2 5/i- 



- 32. Echinosigra (Pourtalesia) paradoxa, ophicephalous pedicellaria. 7/,. 



33- Pourtalesia laguncula, valve of tridentate pedicellaria. 7/j. 



- 34. Wandeli, primary spine, from the invagination, nearer the edge. (Comp. Fig. 20). 



3%- 



- 35. Pourtalesia Wandeli, from the actinal plastron. l8 / t . 



- 36. the point of a primary abactinal spine, so/,. 



37. miliary spine, front view. (Comp. Fig. 41). I2 5/ : . 



- 38. Helgocystis (Pourtalesia) carinata, miliary spine. 4/,. 



- 39. valve of rostrate pedicellaria. 7/,. 



- 40. Pourtalesia Wandeli, tridentate pedicellaria. I2 5/j. 



- 41. miliary spine, side view. (Comp. Fig. 37). I2 5/,. 



42. Echinosigra (Pourtalesia) paradoxa, clavula. 7o/ : . 



- 43. miliary spine. I2 5/!. 



- 44. primary abactinal spine, ss/,. 



