59 217 



Thordisa maculigera, B. 

 Fig. 18, 19. Plates in different positions. 



— 20. End of a series of plates, a the outermost one. 



Figs 18—20 drawn by Cam. 350 X 



— 21. a spermatotheca, b spermatocysta. 



Chromodoris histrio, B. 



Fig. 22. Drawing of the living animal by Dr. Mortexsen. 



— 23. Elements of the lip-plates. 



— 24. Plates of the rasp in different positions. 



Figs. 23 — 24 drawn by Cam. 350 X 



MaHonia chloanthes, B. 



Fig. 25. a median plate, b first lateral one. 



— 26. From the middle of the series of lateral plates. 



Figs. 25— 26 drawn by Cam. 200 x 



— 27. A stomachal plate. 55 X 



Plate m. 



Bornella digitata, Ad. et Reeve. 



Fig. 1. a oesophagus, b first stomach with the bilious duct, c masticatory stomach, d third stomach, 

 e intestine, /'anus: from the underside. 



— 2. Median plates, from the side, 6 lateral. 



— 3. b lateral plates, from the side. 



Figs. 2—3 drawn by Cam. (350 X) 



Bornella excepta, B. 



Fig. 4. a oesophagus and first stomach, bb anterior (lateral) liver, c c posterior (chief-) iiver, d masticatory 

 stomach, e third stomach. 



— 5. Part of the festoon of the praeputium with its thorns. 360 X 



Melibe bucephala, B. 



Fig. 6. The cap-formed head with the mouth-opening, from beneath, a margin of the fore end of the foot. 



— 7. The jaw, a upper end. 



— S. Larger and 



— 9. Smaller stomachal plate. 



Figs. 7—9 drawn by Cam. 55 X 



— 10. Anterior genital mass. 5 /i- « spermatotheca, b prostata, c spermduct, d penis, e vestibulum 



genitale. 



Nossis indica, B. 



Fig. 11. Part of the rasp, a median, & lateral plates. 



— 12. End of a papilla with a expulsed cnidae. 



Figs. 11—12 drawn by Cam. 350 X 



Marsenia perspicua (L.). 



Fig 13. The animal from the backside. '/i. 



— 14. Median plates, from the upper side. 360 X 



D. K. D. VideDsk. Seist. Skr., 6. Række, naturvidensk. og mathem. ifd. SU. 2. 



