PLATE VII. 



CHIRIDOTIN^. 

 Figures 14. Trochodota venusta (Semon). (From Semon, 1887.) 



Figure 1. Adult animal. X 30. 



2. Piece of calcareous ring. X 120. 



3. Sigmoid body. X 500. 



4. Supporting rod from tentacle. X 500. 



Figure 5. Sigmoid bodies of Scoliodota japonica (v. Marenzeller). X 200 (?). (FromThe"el, 

 1886a.) 



Figures 6 and 7. Trochodota purpurea (Lesson). X 230. (From Ludwig, 18986.) 



Figure 6. Sigmoid bodies. 



7. Supporting rod from tentacle. 



Figures 8-13. Twniogyrus contortus (Ludwig). (Fig. 8 from Theel, 1886a; 



others from Ludwig, 1898&.) 



Figure 8. Wheel. X250(?). 



9. Sigmoid body, with ends curved in planes at right angles to each other. X 230. 



10. Sigmoid body, with ends curved in same plane. X 230. 



11. Sigmoid body, same as Fig. 9, seen from side. X 230. 



12. Supporting rod from tentacle. X 230. 



13. Oral disc of larva at 7-tentacled stage, showing origin of sixth and seventh tenta- 



cles simultaneously in the lateral interradia. X 48. 



Figures 14-18. Polycheira rufescens (Brandt). (From Semper, 1868.) 



Figure 14. Tree-like cluster of ciliated funnels from body-cavity (Chirodota variabilis Sem- 

 per). X95. 



15. Wheel (Chirodota variabilis Semper). X 260. 



16. Curved rods from skin (Chirodota variabilis Semper). X 260. 



17. Part of calcareous ring (Chirodota variabilis Semper). X 5 (?) 



18. Tentacle, a = half expanded; 6= contracted (Chirodota pancensis Semper). 



X5(?) 



Figures 19-23. Anapta gracilis Semper. (From Semper, 1868.) 



Figure 19. Calcareous deposits from skin. X 260. 



20. Radial and interradial pieces of calcareous ring. X 5 (?) 



21. Tentacle, showing digits and gustatory organs. X 10 (?) 



22. One gustatory organ from side. X 230 ( ?) 



23. Ciliated funnel from body-cavity. X 95. 



Figures 24 and 25. Chiridota marenzelleri R, Perrier. (From R. Perrier, 1905.) 



Figure 24. Wheel-papilla. X 10. 



25. Stellate miliary granules. X 330. 



Figures 26-29. Chiridota rigida Semper. (From Semper, 1868.) 



Figure 26. Wheel. X 260. 



27. Curved rods from skin. X 260. 



28. Ciliated funnel from body-cavity. X 260. 



29. Calcareous ring, oesophagus and water-vascular ring, with its appendages. 



X 10 (?) 



214 



