364 CEYLON PEARL OYSTER REPORT. 



Fig. 6. Phi/llai>li/SM albomacidata, n. sp., dorsal view, x 2. 



7. Plfurobranchus (Berlhella) citrinus (R. and L.), shell. x7'5. 



8. sculpture of shell. 



9. lateral teeth from radula. x 320. 



10. i, ,i portion of jaw plate, x 320. 



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



12. PhylUplysia pellucida, n. sp., dorsal view, x 2. 



13. Onchidium verruculafum, Cuv., dart, x 31. 



14. papilla of dart sac. 



15. apex of dart, x 78. 



16. another view of same, x 78. 



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



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



18. hooks from glans of penis, x 116. 



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



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



21. 5 outermost teeth from radula. x 310. 



22. median and 2 lateral teeth from radula. x 300. 



23. Afarsenia perspicw, LINN., shell, x 2. 



24. 2 rows of teeth from radula. 



25. apex of lateral tooth. 



26. 2 median teeth. 



