Plate XV. 



I, 2, 5, 8, 13, 19—21, 29, 37, 40, 43, 52 Aeropsis losirata. 6, 12, 27, 34 A. fuha. 10, 14, 15, 22, 25, 32, 36, 39, 41, 51 

 Aceste bellidi/cra. 9, 16—18, 24, 26, 30, 31, 35, 3S, 44, 45, 47, 48, 50 Himiaster expergilus. 42, 46 H. gibbosus. 3, 7, 11 ■^Hi,.sonalus 



4, 33, 49 A', temiis. 23, 28 ^H.t florigertis. 



Fig. I. Aeropsis rostra fa, rostrate pedicellaria. so/j. 



— 2. — — valve of tridentate pedicellaria. 5°/^. 



— 3. '. Hemiaster-D zonatus (« Challengers, St. 126), valve of globiferous pedicellaria; side view. (Coiup. 



Fig. 7). 50/,. ... 



— 4. FIcmiaster tenuis, valve of tridentate pedicellaria. 5°/^. 



— 5. Aeropsis rostra fa, frontal tube-foot. '° ,. 



— 6. — fulva ((Challenger:, St. 191), valve of tridentate pedicellaria. so/j. 



— 7. «I/cmiaster» zonatus («Challenger», St. 126), valve of globiferous pedicellaria, from the inside. 



(Cornp. Fig. 3). 50/^. 



— 8. Aeropsis rostrafa, valve of tridentate pedicellaria. so^'^, 



— 9. Hcmiaster expergifus, rostrate pedicellaria. soy^. 



— 10. Aceste bellidi/era, rosette plate, proximal part, in side view. •40/j. (Comp. Fig. 39). 



— II. <'~Heniiaster» zona f us, valve of rostrate pedicellaria. 7°/i. 



— 12. Aeropsis fulva (Challenger , St. 191), valve of small tridentate pedicellaria. "5/i- 



— 13. — rostrafa, valve of rostrate pedicellaria. 7° V 



— 14. Aceste bellidi/era, — - globiferous — s°/i. 



— 15. — — — - rostrate — so/j. 



— 16. Hemiaster expergifus, valve of rostrate pedicellaria. so/j. 



— 17. — — — - small tridentate pedicellaria. '^5/j. 



— 18. — — — - rostrate pedicellaria. 5o/j. 



— 19. Aeropsis rostrafa, rosette plate, onter end, from below. 5%. 



— 20. — — — — proximal end, from below, '^^/i. 



— 21. — — valve of tridentate pedicellaria. so/^. 



— 22. Aceste bellidifera, — - — — so/j. 



— 23. (.'.Hemiasfera Jiorigerus (type specimen), valve of tridentate pedicellaria. '^5/^. 



— 24. Hemiaster expergifus (<:Talisman ), valve of globiferous pedicellaria. so/j. 



— 25. Aceste bellidifera, valve of tridentate pedicellaria. s"/,. 



— 26. Hemiaster expergifus, valve of tridentate pedicellaria. '^s/i- 



— 27. Aeropsis fulva («Challenger >, St. 191), valve of tridentate pedicellaria. 7%. 



— 28. <s.Hemiasfer.> florigerus (t)'pe specimen), spicule from tube-foot. '75y'j. 



— 29. Aeropsis rostrafa, valve of small tridentate pedicellaria. 7°/,. 



— 30. Hemiaster expergifus, valve of small tridentate pedicellaria. '^s/j. 



— 31. — — — - ophicephalous — "^li- 



— 32. Aceste be Hid f era, — - rostrate — 50/1. 



— 33. Hemiaster tenuis, — - globiferous — .Wj. 



— 34. Aeropsis fulva (:<Albatross;», St. 3393), valve of rostrate pedicellaria. -tJ'i- 



— 35. Hemiaster expergifus, valve of triphyllous pedicellaria. "75 ,. 



— 36. Aceste bellidifera, valve of small tridentate (? rostrate) pedicellaria. '^j/^, 



— 37. Aeropsis rostrafa, — - triphyllous pedicellaria. '■^sj^. 



— 38. Hemiaster expergifus, spicule from tube-foot. '75/,. 



— 39. Aceste bellidifera, rosette plate, inner part, from below. (Comp. Fig. 10). ho/j. 



— 40 a. b. Aeropsis rostrafa, spicules from tube-foot. 7°/i. 



— 41. Aceste bellidifera, spicule from tube-foot. '4o/i. 



— 42. Hemiaster gibbosus, tridentate pedicellaria. 7°/,. 



— 43. Aeropsis rostrafa, miliary spine, with ampulla>>. so/,. 



— 44. Hemiaster expergifus, primary spine, from the anterior end of the test, side view. 35/,. 



— 45- — . — small tridentate pedicellaria. 70/1. 



— 46. — gibbosus, valve of globiferous pedicellaria. 5°/,. 



— 47- — expergifus, globiferous pedicellaria. so/i. 



— 48- — — valve of globiferous pedicellaria. S'y,. 



— 49. — tenuis, small tridentate pedicellaria; (the skin dark coloured), so/,. 



— 50- — expergifus, primar>- spine, from the actinal plastron. 35/,. 



— 51. Aceste bellidifera, valve of tridentate pedicellaria. '^5/,. 



— 52. Aeropsis rostrafa, tridentate pedicellaria. 37/,. 



