Plate VI. 



Oneeliiiuis varinhilis 27. O. spectabilis 42. Temnoiileiinis toreiimaticus 8, 14, 22, 49. T. Hardwickii 32, 34. 

 T. Heevesii 3, Kl. 12. Salmacis sphæroidcs 1, 11, 41. S. bicolor 2, 4, 23, 26, 3!), 4U. S. virgulata 7, 18, 46, 47. 

 IMeurcchinii.s botlirvoules ,'>, 6, 38. PI. maculatus 20, 44 PI. siamensis 16, 36. PI. scillæ 13. PI. 

 ruber 28. PI. Dödcileini 30. 43. Salmacopsis olivacea 25, 30. Microcy|)bus maculatus 19. M. ainiulatus 

 15, 29, 31. M. elcgan.s 24. Mespilia globulus 17. Amblypneustes forniosus 9, 37. A. pallidus 48 A. grossu- 



laria 21, 33. Gymnccbinus iucouspicuus 45. 

 Foi- ail the figures of this plate a Zeiss nistrument was used. 



Fig 1. Trideutate pedicellaria of Salmacis spliceroides. AA. Oc. 1. 



— 2. Valve of globiferous pedicellaria o{ Salmacis bicolor (comp, large form Fig. 26). AA. Oc. 3. 



3. — - — — - Temnopleurus Heevesii; side view (comp. Fig. 10). Apoclir. 



8-0. Oc. 1. 



— i. Valve of ophicephalous pedicellaria af Salmacis bicolor. AA. Oc. 3. 



_ S. _ . globiferous — - Pleiirechinus bulhryuides; side view. D. Oc. 1. 

 6. — -- — -^ - front — — 



— 7. Tridentate pedicellaria of Salmacis virgtilala. AA. Oc. 1. 



— 8. Valve of glol)lfcrous pedicellaria of Temnopleurus toreumaticus; side view (comp. Fig. 14). 



Apochr. SO. Oc. 1. 



— 9. Valve of ophicephalous pedicellaria of Amblijprteiistcs formosns. Apochr. 80. Oc. I. 



_ 10. — - globiferous — - Temiiuplcnrus Reeoesii; front view (comp. Fig. 3). Apochr. 



80 Oc. 1. 



— II. Valve of globiferous pedicellaria of Salmacis spbirroidcs. AA. Oc. 2. 



— 12. — - ophicephalous — - Temnopleurus Rcevesii. Apochr. 30. Oc. I. 



— 13. — - globiferous — - Pleurechinus scilhr. D. Oc. I. 



_ 14. — - — — - Temnopleurus toreumalicus . front view (comp. Fig. 8). 



Apochr. 8-0. Oc 1. 



— 15. Valve of ophicephalous pedicellaria of Microcijphus annulatus. Apochr 80. Oc. t. 



— 16. Spicules from buccal membrane of Pleurechinus siamensis D. Oc. 1. 



— 17. Valve of triphyllous pedicellaria of Mespilia i/lohulus D. Oc. 2. 



— IS. — - globiferous — - Salmacis viryulata. AA. Oc. 2. 



— 19 _ - _ — - Microcyphus maculatus: side view (comp/ PI VII. 20). 



Apochr. 8 0. Oc. 1. 



— 20. Valve of globiferous pedicellaria of Pleurechinus maculatus; side view (comp. PI VII. 17). 



D Oc. 1. 



— 21. Valve of triphyllous pedicellaria of Amblypneustes grossularia. D Oc 1. 



— 22. — - ophicephalous — - Temnopleurus toreumaticus Apochr. 80. Comp Oc. 4. 



— 23. — - triphyllous — - Salmacis bicolor. Apochr. 80. Comp. Oc. 4 



— 24. — - globiferous — - Microcfiphus eleyans; side view (comp PI. VII 38). I). Oc. 1. 



— 25. Valve of globiferous pedicellaria of Salmacopsis oliuacca; side view (comp. Fig. 30). Apochr. 



8-0. Comp. Oc. 4. 



— 26. Valve of globiferous pedicellaria. large form, of Salmacis bicolor (comp. Fig. 2). AA. Oc. 3. 



— 27. — - — — of Upcchinus variabilis; side view (comp PI. VII. 2). Apochr. 



8-0. Comp. Oc. 4. 



— 28. Valve of globiferous pedicellaria of Pleurechinus ruber: side view (comp. PI. VII. 6). D Oc. 1. 

 29. — - — — - Microcyphus annulatus: side view (comp. Fig. 31). D. Oc. t. 



— 30. — - — — - Salmacopsis oUvacea: front view (comp. Fig. 25). Apochr. 



80. Comp. Oc. 4. 



— 31. Valve of globiferous pedicellaria of Microcyphus annulatus: front view ;comp. Fig. 29|. D Oc. I. 



— 32. — - ophicephalous — - Temnopleurus ilardnnckii. Apochr. 8 0. Oc. 1. 



— 33. — - globiferous — - Amblypneustes yrossularia. AA Oc. 3. 



— 34. — - — — - Temnopleurus //ardiixVAii ; front view (comp. PI. VII. 21). 



Apochr. 80. Oc. 1. 



— 35. Valve ol globiferous pedicellaria of P/cKrct/iiniisüörfprZcin!; side view (comp PI. VII. 101. D. Oc. 1. 



— 36. — - — — - siamensis: — — ( — PI. VII. 14). — 

 _ 37. — - — — - Amblypneustes formosus; — — ( — PI. VII. 4 ). — 



— 38. Tridentate pedicellaria of Pleurccliinus bolhryoidcs. Apochr. SO. Oc. 1. 



— 39. Valve of small tridentate pedicellaria of Salmacis bicolor. AA. Oc. 3 



— 40. — - large — - — — (comp. PI. VII. I) AA. Oc. 2. 



— 41. — - tridentate pedicellaria of Salmacis sphæroidcs. AA. Oc. 2. 



— 42. — - — — - Opechinus speelabilis. Apochr. 8'0 Oc. I. 



- 43. — - triphyllous — - Pleurechinus Döderleini. D. Oc. 2. 



- 44. — - — — - — maculatus 1. 



— 45. — - tridentate — - Gymnechinus inconspicuus. D. Oc. I. 



— 46. — - — — - Salmacis viryulata : side view. AA. Oc. 3. 



— 47. — - — — - — — front — — 



— 48. — - — - - Amblypneustes pallidus. Apochr. 8 0. Comp. Oc. 4. 



— 49. Tridentate pedicellaria of Temnopleurus toreumaticus. AA. Oc. 1. 



