Plate XII. 



MOLPADIID^. 



Figures 1 and 2. Molpadia arcnicola (Stimpson). 



Figure 1. Eadial and interradial jiieces of cak-areuus ring. X -i- 

 2. Perforated plates from caudal region. X 156. 



Figures 3 and 4. Acaudina demissa (Shiiter). (From Sluiter, 1901.) 



Figure 3. Calcareous ring. X 2 (?). 



4. Calcareous plate from skin. X 360 ( ?) 



Figures 5-15. Molpadia intermedia (Ludwig). 



Figure 5. IJosette of 6 plates, with anchor. X 55. 



6. Eosette of 5 plates. X 55- 



;. Eosette of 4 plates. X 55. 



8. Eosette of 3 plates, with broken anclior. X 156. 



9. Eosette of 2 plates. X 55. 



10. Late remains of a rosette. X 55. 



11. Later remains of a rosette. X 55. 

 13. Last remains of a rosette. X 55. 



13. Calcareous ring. X 4. 



14. Perforated plate from anterior part of Ixidv. X 156. 



15. Table seen from side. X 230. (From Ludwig, 1894.) 



Figures 16-37. Eupi/rgiis scaber Llitken. 



Figure 16. Adult. Natural size. 



17. Oral disk with retracted tentacles. X 5. 



18. Anal opening, showing anal teeth. X 5. 



19. Part of calcareous ring. X 10 (?) (From Semper, 1868.) 



20. Interradial piece of calcareous ring from outer side. X 20 (?) (From Semper, 



1868.) 



21. Interradial piece of calcareous ring from within. X 20 (?) (From Semper, 



1868.) 



22. Tentacle. X 10. 



23. Tables, seen from above. X 125. 



24. Spire of table, from side. X 125. 



25. Tables, according to Barrett, 1857. 



26. Cloaca and rcspiratorv trees. X 10 (?) ( Froni Semper. ISGS.) 



27. l)i( (if body-wall, to show simple loiigiiudinal musi-lcOiaiul. X 70. 



Figures 28 and 29. Enpi/rgus pacificus Ostergreu. X 125. (From Ostcrgren, 19056.) 



Figure 28. Ta!)les from above. 



29. Spire of table from side. 



224 



