216 58 



Aelesia oceUigera, Bgh. 



Fig. 31. A simple Villus. 55 X 



— 32. A compound Villus. 



— 33. The rhinophor. 



— 34. Part of the palate. 350 X 



— 35. A single thorn of the same. 750 X 



— 3fi. Elements of the mandibles. 



— 37. Outmost lateral plates, a the outmost one. 



— 38. Cones of the bottom of the praeputium. 



Figs. 36—38 drawn by Cam. 350 X 



Plate II. 



Aclesia oceUigera, B. 



Fig. 1. The sill-cavity from above, a kidney, 6 pericardium with the transparent heart, c its right darkly 

 pigmented margin, d the gill, e anal papilla. 



— 2. The central nervous system ; a cerebral and 6 b pleural ganglia, between the two latter the two vis- 



ceral ganglia, ce pedal and d buccal ganglia. 



— 3. The tongue from the upper side, a rasp sheath. 



— 4. From the rhachidian part of the rasp; a median, 6 lateral plates. 



— 5. Inmost part of a lateral series of plates, a first, b fourth plate. 



— 6. o the serth, b the seventh plate. 



Figs. 4—6 drawn by Cam 350 x 



— 7. Median and first lateral plate from a smaller individual. 



— S. Outmost part of 6 series of plates, a outmost. 



Figs. 7— S drawn by Cam. 350 X 



— 9. a oesophagus, 6 salivary glands, c stomach, dd margins of the posterior visceral mass (liver), 



e posterior stomach, f g intestine. 



— 10. a Duct of the hermaphrodit-gland, b anterior genital mass, c spermatoc\sta, d spermoviduct, 



e spermatotheca, /" vulvar-papilla. 



— II. Penis. s /i. a M. retractor. 



Doridium lineolatum. Ad. 

 Fig. 12. The animal, from the backside. 5 /i- 



Plakobranclius ocettatus, va>- Hass. 



Fig. 13. A dental plate. 



— 14. The hook of the penis. 



Figs. 13—14 drawn by Cam. Inc. 



Pkyttidieüa nobilis. Bgh. 

 Fig. 15. Drawing by Dr. Mortessbx of the living animal. 



Doriopsis rubra i&elaahti. 

 Fig. 16. End of the glans penis; a vas deferens. 



Doriopsis nigra (Simpson). 



Fig. 17. Part of the armature of the vas deferens. 



Figs. 16—17 drawn bv Cam. lue. 350 X 



