PLATE IV. 



SYNAPTIN^E. 



Figures 1-7. Protarikyra duodactyla, sp. nov. 



Figure 1. Adult. X 3. 



2. Eadial and interradial pieces of calcareous ring. X 20. 



3. Anchor. X 156. 



4. Anchor-plate, as they most commonly appear. X 156. 



5. Fully developed anchor-plate. X 156. 



6. Early stage of development of anchor-plate. X 156. 



7. Supporting rods from tentacles. X 156. 



Figures 8-11. Protankyra abyssicola (Theel). 



Figure 8. Anchor. X 85. 



9. Anchor-plate. X 85. 



10. Tentacles. X 20. 



11. Supporting rods from tentacles. X 156. 



Figures 1214. Protanlcyra brychia (Verrill). 



Figure 12. Anchor. X 55. 



13. Anchor-plate. X 55. 



14. Miliary granules. X 156. 



Figures 1719 and 26. Synapta maculata (Cham. & Bys.). 



Figure 15. Anchors. X 95. 



16. Miliary granules. X 95. 



Figures 1719 and 26. Synapta maculata Cham. & Eys. 



Figure 17. Anchor. X 65 (?). (From The"el, 1886a.) 



18. Miliary granules or rosettes. X 400 (?). (From Thee], 1886a.) 



19. Anchor-plate. X 65 (?). (From Th6el, 1886a.) 



26. Ciliated funnel from body-cavity. X 500. (From Semper, 1868.) 



Figures 20-22. Polyplectana kefersteinii (Selenka). X 95. (From Semper, 1868.) 



Figure 20. Anchor-plate. 



21. Miliary granules. 



22. Anchor. 



Figures 23-25. Euapta lappa (Miiller). (From Theel, 1886a.) 



Figure 23. Miliary granules or rosettes. X 300 (?). 



24. Anchor-plate. X225(?). 



25. Anchor. X 225 (?). 



