364 



CEYLON PEARL OYSTER REPORT. 



Fig. 6. 



7. 



8. 



9. 



10. 



11. 



,. 12. 



13. 



14. 



,. 15- 



16. 



17. 



18. 



19. 



20. 



21. 



22. 



23. 



24. 



25. 



26. 



Phylla/plysia nlbomactthrta, n. sp., dorsal view, x 2. 



I'll urohranchua (BerfheJIa) ri/rinus (R. and L.), shell, x 7 - 5. 



,, sculpture of shell. 



lateral teeth from radula. x 320. 

 portion of jaw plate, x 320. 



Aplysiella mollis, n. sp., dorsal view, x 1 -5. 

 Phyllaplysia pelhmda, n. sp., dorsal view, x 2. 

 Onchidium vemwulatum, Cuv., dart, x 31. 



papilla of dart sac. 



apex of dart, x 78. 



Marsenia perspicua, Linn., shell, x -j. 



2 rows of teeth from radula. 



,, apex of lateral tooth. 



,, ,, 2 median teeth. 



another view of same, x 78. 



male gonads, a, ampulla of dart sac ; b, dart sac ; c, rod of penis ; 



d, vas deferens ; ?, retractor penis ; /, adductors, x 28. 



hooks from glans of penis, x 116. 



teeth from radula, 53rd and 54th from centre, x 300. 



side view of tooth from near margin of radula. x 300. 



5 outermost teeth from radula. x 310. 



median and 2 lateral teeth from radula. x 300. 

 o 



