302 CEYLON PEARL OYSTER REPORT. 



Fig. 20. Poresllidium ravanas, n. sp., female, anterior antenna. x 260. 

 ,, 21. ,, ,, ,, 5th natatory leg. x 195. 



,, 22. ,, ., abdomen and furca. x 156. 



PLATE XIII. 



Fig. 1. Peltidium ovale, n. sp., female, from above, x 40. 



,, 2. ,, ,, anterior antenna. x 195. 



,, 3. ,, ,, 2nd maxilliped. x 95. 



,, 4. ,, 1st natatory leg. x 95. 



5. 4th x 95. 



., 6. 5th x 95. 



,, 7. Peltidium angulatum, n. sp., female, from above, x 53. 



..8. ,, anterior antenna. x 195. 



,, 9. ,, ,, 2nd maxilliped. x 95. 



10. ,, 1st natatory leg. x 95. 



11. ,, ,, 5th x 195. 



12. Peltidium speciosvm, n. sp., female, from above, x 53. 



,, 13. ,, ,, anterior antenna. x 195. 



,, 14. ,, ,, 2nd maxilliped. x 95. 



15. 1st natatory leg. x 120. 



10. 5th x 195. 



,,17. ,, ,, a smaller form, with thinner bands. x 64 



18. Peltidium senatum, n. sp., female, from above, x 40. 



(1 19. ,, anterior antenna. x 195. 



20. 2nd maxilliped. x 95. 



21. 1st natatory leg. x 95. 



22. 5th x 95. 



,, 23. Peltidium perplexum, n. sp., female, from above, x 40. 



24. ,, ,, anterior antenna. x 156. 



25 ,, ,, ,, 2nd maxilliped. x 95. 



26. u 1st natatory leg. x 95. 



27. .. ,. 5th x 195. 



PLATE XIV. 



Fi<* 1. Pmidanthessius maximum, n. sp., female, from above, x 27. 



2. ,, ,, anterior antenna. x 90. 



3. ,, ,, posterior antenna. x 90. 



4 ., mandible and palp. x 156. 



h 5. ., 1st maxilliped. x 120. 



6. 2nd x 90. 



7. >, 1st natatory leg. x 60. 



", 8. ,, 4th x 90. 



9. 5th x 90. 



10. male, 2nd maxilliped. x 90. 



11 ,, ,, abdomen and fiu ca. x 30. 



12. Pseudanthessius chelifer, n. sp., female, from above. x 80. 



1*5 ,, ,, ,, anterior antenna, x 260. 



