EXPLANATION OF PLATES. 



(All figures are drawn by the author.) 

 Plate 8. 



Fig. 1. Synallactes multivesiculatus, new species. 



a. Triradiate tablelike deposit from ventrum, side view, b. Same with disklike 

 base, seen from above, c. Ordinary type seen from above. X 200. 



Fig. 2. Synallactes gilberti, new species. 



a. Quadriradiate tablelike deposit from dorsum, seen from above, b. Same from 

 ventrum, side view. X 300. 



Fig. 3. Bathyplotes ostergreni, new species. 



a. Quadriradiate tablelike deposit from base of dorsal papilla, seen from above. 

 b. Same seen from side. c. Same from ventrum, seen from above, d. Same seen 

 from side. X 300. 



Fig. 4. Mesothuria media, new species. 



a. Table from dorsum, side view. b. Same seen from above. X 300. 



Fig. 5. Pseudostichopus aleutianus, new species. 



a. Deposit from wall of genital tube. b. Same from perianal region, X-shaped 

 type. c. Same, rod-like type. X 300. 



Fig. 6. Pseudostichopus molpadioides, new species, 

 a, 6. Supporting rods of pedicel. X 300. c. Deposit from perianal region. X 150. 



Fig. 7. Pseudostichopus unguiculatus, new species. 



a, b. Spicules from wall of genital tubes, c. Supporting rod of dorsal papilla. 

 X300. 



Fig. 8. Pannychia moseleyi virgulifera, new subspecies. 



a. Rod from ventrum, commonest type. b. Same, smooth type. X 150. 



Fig. 9. Ilyodsemon miurense, new species. 



a. Large wheel. X 200. b. Small wheel, c. Complicated rosette. X 300. 



Plate 9. 



Fig. 10. Peniagone japonica, new species. 



Large X-shaped spicule from deeper part of dorsal perisome. X 150. 



Fig. 11. Achlyonice monactinica, new species. 



a. Spicule from wall of genital tube. b. Triradiate spicule from ventrum. c. 

 Commonest spicule from ventrum. X 300. 



59758°— Proc.N.M.vol.48— 14 19 289 



