PLATE II. 
Figs. 1-12. Discodoris morphcea, Bergh. 
Pig. 1. Median section of a dorsal tubercle. Cam. luc. x 200 cliam. 
Fig. 2. Prehensile ring ; a, upper part; b, lower part. Cam. luc. 
Fig. 3. Portion of upper end of the same. Cam. luc. x 750 diam. 
Fig. 4. Points of some of the elements from above. Cam. luc. x 900 diam. 
Fig. 5. Middle portion of the radula ; a, rhachidian fold ; b, b, b, first lateral teeth. Cam. luc. x 350 
diam. 
Fig. 6. One of the largest teeth, from the outer side. Cam. luc. x 350 diam. 
Fig. 7. Another, from the inner side. Cam. luc. x 350 diam. 
Fig. 8. Another, seen obliquely from the under surface. Cam. luc. x 350 diam. 
Fig. 9. Outermost part of two series of teeth ; a, outermost tooth ; b, the sixth ; c, cuticular folds. 
Cam. luc. x 350 diam. 
Fig. 10. Part of the pulp of the radula ; a, posterior; b, anterior part. Cam. luc. x 350 diam. 
Fig. 11. Salivary glands ; a, a, efferent ducts ; b, b, hinder attenuated ends of the glands. 
Fig. 12. a, Spermatocyst ; b, inner portion, c, outer portion, of uterine duct. 
Fig. 13. Archidoris australis, Bergh. 
Fig. 13. Portion of kidney ; a, urinary chamber. Cam. luc. x 55 diam. 
Figs. 14-17. Ceratosoma cornigerum, Adanis. 
Fig. 14. Anterior end of Bulbus pharyngeus, with the labial disk and the oral aperture. 
Fig. 15. Outer part of three series of teeth ; a, a, outermost teeth. Cam. luc. x 750 diam. 
Fig. 16. a, Muscular part of vas deferens ; b, upper solid portion of penis ; e, its termination in the 
prseputium. 
Fig. 17. ci, Spermatheca; b, vaginal duct; c, vagina; d, uterine duct; e, spermatocyst. 
Figs. 18-24. Platydoris eurycldamys, Bergh. 
Fig. 18. Median part of radula; a, a, first lateral teeth. Cam. luc. x 350 diam. 
Fig. 19. Outermost parts of three series of teeth (5-5-2) ; a, a, a, outermost teeth. Cam. luc. x 
350 diam. 
Fig. 20. Two outermost teeth ; a, supplementary tooth. Cam. luc. x 350 diam. 
Fig. 21. A dorsal tubercle. Cam. luc. x 200 diam. 
Fig. 22. a, Spermatheca ; b, vaginal duct ; c, vagina ; dd, uterine duct ; e, spermatocyst. 
Fig. 23. Upper portion of penis, opened to show the glans within the prceputium and several disks. 
Cam. luc. x 100 diam. 
Fig. 24. Hooks of two of these disks. Cam. luc. x 350 diam. 
