362 CEYLON PEARL OYSTER REPORT. 



Fig. 20. Platydmis spinulosa, n. sp., dorsal view of bulbus pharyngeus. 



)( 21. - stomach, dorsal view. 



22. vagina, after treatment with caustic potash, x 15. 



23. opposite plates from vagina, x 60. 



PLATE III. 



Fig. 1. Platydoris spinuhsa, n. sp., lateral teeth from radula, 36th and 37th from middle, x 300. 



2. innermost 4 teeth, a = innermost, x 300. 



3. M outermost 8 teeth, x 300. 

 4. Halgerda pwnctata, n. sp., lateral view of animal, x 2. 



5. H outermost 4 teeth from radula. x 300. 



6. .- arrangement of branchiae. 



M 7. innermost teeth of radula. a = rachis. x 300. 



8. Platydffris inframaculata (ABR.), innermost teeth of radula. a = rachis. x 100. 



M 9. 3 outermost teeth, x 300. 



10. Platydffris spedosa (ABR.), 4 outermost teeth, x 300. 



11. Chromodoris tenuilinearis, n. sp., animal, dorsal view. 



1( 12. median teeth from radula. a = rachis. x 480. 



() 13. 3 outermost teeth from radula. a = outermost, x 480. 



14. 3 teeth from middle of lateral row. x 480. 



n 15. elements of jaw plate, a = side view of one. x 480. 



16. Phyllidia nobilis, BGH. (?), animal, dorsal view, x 2. 



17. head and front of foot. 



18. dlgires villosus, n. sp., animal, lateral view from right, x 7. 



19. tubercles surrounding branchial pore, from left side. 



20. rbinophore sheath. 



21. buccal collar, x 31. 



22. lateral teeth from radula. x 310. 



23. Kalinga wnata, A. and H., median teeth. a = rachis. x 310. 



24. lateral teeth. u = innermost, x 310. 



PLATE IV. 



Fig. 1. Philine aperta, LINN., shell, x 2. 



2. Aplysia wrnigera, Sow., teeth from radula, median and 2 lateral, x 127. 



3. 5th and 6th teeth from centre of radula. x 127. 



4. shell. x2. 



5. teeth from radula, 12th from centre to margin, x 127. 



6. section of hyaline gland, x 52. 



7. gill. x2. 



8. Aplysia intermedia, n. sp., median tooth from radula. x 340. 



9. Aplysia elmgata, PSK., median tooth from radula. x 340. 



10. ,, lateral view of head. 



11. shell, ventral, x 7. 



12. . shell, lateral, x 7. 



13. Phyllaplysia allxmtaculala, n. sp., teeth from radula, median to 6th lateral, x 310. 



14. 6 outermost teeth from radula. x 310. 



,. 15. shell, ventral x7'5. 



16. apex of shell showing spire. 



