Plate XL 



4. 7— io> 3° Pourlalesia Jeffreysi. i, 13, 14, 18—20, 23, 34—37. 4°, 4i P- Wandeli. 2, 3, 5, 6, 17, 21, 24, 25, 27—29, 32, 42—44 

 Echinosigra (Pourialesia) paradoxa. 12, 33 P. lagimcula. 11 P. Tanneri. 31 P. hispida. 15, 26 j°. rosea. j5, 22, 38, 39 



Helgocystis (Pourtalesia) carinaia. 



Fig. I. Pourtalesia Wandeli, rostrate pedicellaria. ^°l^. 



— 2. Echinosigra (Pourtalesia) paradoxa, valve of tridentate pedicellaria, from the inside. '^5/^. 



— 2- — — — — " ophiceplialous — '^s/i. 



— 4. Pourtalesia Jeffreysi, valve of ophicephalous pedicellaria, side view. "5/j. 



— 5. Echinosigra (Pourtalesia) paradoxa, valve of tridentate pedicellaria. "Vi- 



— 6. — — — — - ophicephalous — side view. '^s/j. 



— 7. Pourtalesia Jeffreysi, valve of ophicephalous pedicellaria, from the inside. "5|i- 



— 8. — — — - tridentate — '75/,. 



— g. — — rostrate pedicellaria. so/,. 



— 10. — — valve of rostrate pedicellaria, from the inside. (Comp. Fig. 30). 7°/,. 



— II. — Tanneri, — - — — '°/i. 



— 12. — lagimcula, — - ophicephalous pedicellaria. '25/^_ 



13. — Wandeli, ophicephalous pedicellaria. 



70 



/I- 



14. — — valve of ophicephalous pedicellaria, side view, '^s/i- 



— 15. — rosea. — - tridentate — "5/i. 



— 16. Helgocystis (Pourtalesia) c«w/a/'rt, valve of globiferous pedicellaria, .side view. (Comp. Fig. 22). 7%. 



— 17. Echinosigra (Pourtalesia) paradoxa, rostrate pedicellaria. 7°/,. 



— 18. Pourtalesia Wandeli, valve of ophicephalous pedicellaria. '^s/i. 



— 19. — — — - rostrate — from the inside. (Comp. Fig. 23.) 7°/,. 



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



— 21. Echinosigra (Pourtalesia) paradoxa, primary spine, from the inner part of tlie buccal cavity. 5°/i. 



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



Fig. 16). 70/,. 



— 23. Potirtalesia Wandeli, valve of rostrate pedicellarise, side view. (Comp. Fig. 19.) 7°/,. 



— 24. Echinosigra (Pourtalesia) paradoxa, tridentate pedicellaria. 7°/,. 



— 25. — — — sphseridia. "S/i- 



— 26. Pourtalesia rosea, ophiceiihalous pedicellaria. 7°/,. 



— 27. Echinosigra (Pourtalesia) paradoxa, valve of rostrate pedicellaria, from the inside. '^5 i- 



— 28. — — — _._ — side view. '^5/,. 



— 29. — — — tridentate pedicellaria. 7°/^. 



— 30. Pourtalesia Jeffreysi, valve of rostrate pedicellaria, side view. (Comp. Fig. 10). 7°/,. 



— 31. — hispida, — - tridentate — '^Yi- 



— 32. Echinosigra (Pourtalesia) paradoxa, ophicephalous pedicellaria. 70/j. 



— 33. Pourtalesia lagimcula, valve of tridentate pedicellaria. 70/,. 



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



— 35. Pourtalesia Wandeli, — — from the actinal plastron, '^'i- 



— 36. — — the point of a primary abactinal spine. 3°/,. 



— 37. — — miliary spine, front view. (Comp. Fig. 41). "5/,. 



— 38. Helgocystis (Pourtalesia) carinata, miliary spine, -t"/!. 



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



— 40. Pourtalesia Wandeli, tridentate pedicellaria. '=^5',. 



— 41- — — miliary spine, side view. (Comp. iMg. 37). '^s/i- 



— 42. Echinosigra (Pourtalesia) paradoxa, clavula. 7"/,. 



— 43- — — — miliary spine, '^sy,. 



— 44- — — — primary abactinal spine. 35/,. 



