28 SIR CHARLES ELIOT. 



DESCRIPTION OF PLATES. 



PAGE 



Fig. A. Tritoniella belli A preserved specimen from above 6 



B. from below ... ... 6 



C. Tritoniella sinuata Dorsal surface ... ... ... ... ... ... ... ... 10 



D. Bathydoris inflata Seen from below 17 



E. Bathydoris hodgsoni Ventral view ... ... ... ... ... ... ... ... 12 



F. Side view 12 



G. Dorsal view 12 



H. Notaeolidia depressa Seen from above 20 



I. Seen from below 20 



J. Oalvinella antarctica From above 26 



K. - From below ... 26 



DESCRIPTION OF FIGURES. 



PAGE 



Fig. 1. Tritoniella belli Specimen A from above 7 



2, 3, 4. Anterior part of back in three specimens showing the varying arrangement 



of tubercles 8 



,, 5. Jaws 9 



6. Rhachidian tooth ... ... ... ... ... ... ... 9 



7. First lateral tooth 9 



8. Three laterals from the middle of the half row 9 



9. Tritoniella sinuata Rhachidian tooth n 



10. Three lateral teeth n 



11- Verge H 



12. Bathydoris hodgsoni Central nervous system : a cerebral ganglia ; b pleuval ganglia ; 



c pedal ganglia ; ^commissure; e buccal ganglia ... ... ... 14 



., 13. Three rhachidian teeth, a, b, c ... ... ... ... ... 15 



14. First lateral tooth, d 15 



15. Second (e), and third (/) laterals 15 



16. Laterals from the middle of the half row seen from the side ; the 



other teeth are seen from above ... ... ... ... ... 15 



17. Bathydoris inflata Rhachidian teeth 18 



18. Two first laterals 18 



19. Second lateral 18 



20. Third lateral ... 18 



21. Lateral from the middle of half row 18 



22. Notaeolidia depressa Rhachidian tooth from above 21 



23. )t f rom t, ne 8 jd e 2i 



24. a first lateral tooth ; b second ; c third ; ^fourth ... 22 



25. Outhonella anlarctica A tooth from above ... ... ... 23 



" 26. ,, from the side ... ... ... ... ... ... 23 



27. Cuthonella paradoxa A tooth; a from above ; b from below ... 24 



28. Galvinella antarctica Cerata ... ... ... 26 



29. Central tooth ; a from below ; b from above... ... ... ... 27 



30. Lateral teeth 27 



