(140) 



Plate XII. 

 Aphelodoris brunnea, B. 



FIG. 



1. Anterior genital mass, a, hermaphrodite duct ; b, muco-albuminous 



mass ; cc, prostata, vas deferens ; d, vestibulmn genitale ; e, sper- 

 matotheca and spermatocysta. 



Geitodoris capensis, B. 



2. Piece of the lip-plate. 



3. From the inner part of the rasp, a, innermost plate. 200 x . 



4. Plate herefrom. 



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



(Figs. 4-5 drawn by Cam. 350 x .) 



Triopa lucida, Stimpson. 



6. Club-shaped appendix, of the back. 



7. a, First ; b, second lateral plate ; c, outer plate. 



Nembrotha capensis, B. 



8. Bulbus pharyngeus, from the upper side. 4/1. 



9. Median plates. 



10, 11, and 12. Lateral plates in different positions. 



13. The outer plates, a, outermost. 



14. Innermost (first) of the outer plates. 



(Figs. 9-14 drawn by Cam. 100 x . 



15. Hooks of the penis. 



16. a, Spermatotheca ; b, spermatocysta. 



17. Vestibular gland. 



EuPLOCAMus CROCEus, Phil., var. capensis. 



18. Head with tentacles and fore end of the foot. 



19. Arbuscule of the back. 



20. Genital papilla with vulva and end of the penis with prominent 



armature. 



21. Mandibular plate. 12/1. 



22. Inner part of the rasp with the three lateral plates ; and a, the inner- 



most plates of the outer series. 



23. End of the glans. 



(Figs. 22-23 drawn by Cam. 200 x . 



24. Hooks of the glans. 350 x . 



