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Plate XI. 

 Pleurobranch^ea capensis, Vayss. 



FIG. 



1. Piece of the mandibular plates, from the side. 



2. A piece of the mandibular plate, from the upper end. 



3. One of the largest plates of the rasp, from the margin. 



4. A similar one from the fore-side. 



5. A plate from the middle of a series. 



6. Outermost end of a series. 



(Figs. 1-6 drawn by Cam. luc. 350 x .) 



7. The prsebranchial sac. 



8. End of the internal sheath of the vas deferens. 



Oscaniella nigropunctata, B. 



9. Squares of the back, partly withiblack centre. 



10. The shell from the upper side. 9/1. 



11. Serpent-like filaments of the skin of the back. 



12. Element of the mandibular plate, from the upper side. 



13. Similar, from the side. 



14. Similar, from the under side. 



15. Inmost plate of the rasp. 



16. Plates of the inner part of the rasp. 



17. Largest plate from the middle of the rasp. 



18. Outer end of a series of plates, a, outermost of 7 plates. 



(Figs. 11-18 drawn by Cam. 350 x .) 



Archidoris scripta, B. 



19. The animal, from the back side. 2/1. 



20. Spikel of the skin of the back. 



21. Plates of the outer part of the rasp, a, outermost. 



22. Plate from the median part of a series. 



23. Largest plate. 



24. Outer end of a series of plates, a, outermost plate. 



(Figs. 20-24 drawn by Cam. 350 x .) 



25. a, Spermduct ; b, penis ; c, prseputium with glans. 



Staurodoris verrucosa (Cuv.). 



26. Plates of the middle of the rasp. 



27. Outer end of a series of plates, a, outermost plate. 



Aphelodoris brunnea, B. 



28. Innermost plate of a series of the rasp. 



29. Outer end of a series of plates, a, outermost. 



(Figs. 26-29 drawn by Cam. 350 x .) 



