290 PROCEEDINGS OF THE NATIONAL MUSEUM. ' vol. 48. 



Fig. 12. Benthodytes gotoi, new species. 

 Spicule with anchor-shaped spire from papilla. X 100. 



Fig. 13. Stichopus nigripunctatus Augustin. 



a. Table with large, entire disk and tall spire, from a young individual, side view. 



b. Same, from above. X 300. 



Fig. 14. Molpadia clarki, new species. 



a. Table with excentric disk, from side. b. Same, from above, c. Elongated table 

 from tail. X 120. 



Fig. 15. Molpadia infesta, new species. 



a. Table from general perisome. 6. Rhombic plate from tail. X 100. 



Fig. 16. Capheira mollis, new species. 

 a. Table seen from above, b. Same, side view. X 200. 



Fig. 17. Caudina ludwigi, new species. 



a. Spinous table from posterior region seen from above, b. Same, side view. c. 

 Spinous plate without spire. X 120. 



Plate 10. 



i 



Fig. 18. Cucumaria ijimai, new species. 

 a, c. X-shaped rods from ventrum. b. Same in early developmental stage. X 200. 



Fig. 19. Cucumaria lamperti, new species. 

 a. Large knobbed plate, b. Small smooth button with spines. X 100. 



Fig. 20. Cucumaria spinosa, new species. 



a. Typical button with one-holed, tail-like process, b. Same seen from side. c. 

 Same in early developmental stage. X 150. 



Fig. 21. Cucumaria sluiteri, new species. 



a. X-shaped table-like deposit, side view, b. Same seen from above. X 150. 



Fig. 22. Cucumaria constricta, new species. 



a. Table-like button, side view. b. Same, from above. X 150. 



Fig. 23. Thyone parva, new species. 



Spectacle-like body from superficial layer. X 200. 



Fig. 24. Thyone bicornis, new species. 



a. Table-like button from general perisome, side view. b. Same, from above. 



c. Button from pedicel, side view. d. Same, from above. X 300. 



Fig. 25. Pseudocucumis watasei, new species. 

 a. Table-like deposit, seen obliquely from above, b. Same, from below. X 200. 



Fig. 26. Pseudocucumis sagamiensis, new species. 

 a. Table-like deposit seen from above. 6. Same, from side. X 200. 



