Plate XVI. 



I, 2, 5 10, 22, 24, 25, 27, 29, 31, 32, 34 Spalangns purpureus. 17, 23, 28 Spat. Raschi. n, 19 Spat, altus (? Lutkeni). 

 3, 4, 13 15, 20, 30, 33 Macropneustes spatangoides. 12 Echinocardium capense. 16 Eck. mediterraneum. 18 Ech. pennatifidum. 



21 Vr^. cor datum. 26 Zsc^. flavescens. 



Fig. i. Spatangus purpureus, valve of large tridentate pedicellaria, side view. (Comp. Fig. 9). 7/ t . 



2. triphyllous pedicellaria. 62 /!. 



3. Macropneustes spatangoides ( Challenger*, 81.33), valve of short tridentate pedicellaria. 5/ lP 



4. - ophicephalous ?%. 

 5. Spatangus purpureus, ophicephalous pedicellaria. ?%. 



6. valve of ophicephalous pedicellaria. '75/j. 

 7. - short tridentate ?%. 



8. short tridentate pedicellaria. 37/j. 



9. valve of large tridentate pedicellaria, from the inside. (Comp. Fig. i). 7<y : . 



10. Spatangus purpureus, - short side view. 1 ^J 1 . 



- ii. altus (Liitkenii), valve of short tridentate pedicellaria. ?%. 



12. Echinocardium capense, - triphyllous 24 %. 



13. Macropneustes spatangoides (Challenger, St. 33), valve of short tridentate pedicellaria. 37/ x . 



14. (Albatross, St. 2655), s<y x . 



- 15. (Challenger, 8133), triphyllous i75/ t . 



- 1 6. Echinocardium mediterraneum, valve of triphyllous pedicellaria. 2 4/,., 



17. Spatangus Raschi, valve of short tridentate pedicellaria. ?%. 



18. Echinocardium pennatifidum, valve of triphyllous pedicellaria. 2 4/ 1 . 



- 19. Spatangus altus (Lutkeni!), valve of short tridentate pedicellaria. 7%. 



20. Macropneustes spatangoides ( Challenger*, 81.33), valve of large tridentate pedicellaria. 37/ x . 



2i. Echinocardium cor datum, valve of triphyllous pedicellaria. 2 ^/ I . 



22. Spatangus purpureus, I2 5/ x . 



- 23. Raschi, - tridentate s<y x . 



- 24. purpureus, subanal area of a specimen 4 mm in diameter. T 5/,. 



25. valve of tridentate pedicellaria. 7 /j. 



26. Echinocardium jlavescens, valve of triphyllous pedicellaria. ^o/j. 



27. Spatangus purpuretis, valve of small tridentate pedieellaria. I ^/ I . 



28. Raschi, - large tridentate 7/ x . 



- 29. purpureus, specimen 4 mm long, actinal side. I ^>/ I . 



30. Macropneustes spatangoides (Challenger, 81.33), tridentate pedicellaria. 35/ Ig 



31. Spatangiis purpureus, specimen 4 mm long, side view. 'S/j. 



- 32. subanal area of a specimen 9 mm in diameter. 8 / t . 



- 33. Macropneustes spatangoides (Challenger, St. 33), large tridentate pedicellaria. 3/j. 



- 34. Spatangus purpureus, specimen 4 mm long, abactinal side. I ^/ I . 



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