PLATE VIII. 
Figs. 1-13. Bornella excepta, Bergh. 
Fig. 1. Foremost papilla of left side, from the outer side ; act, the back. 
Fig. 2. Left mandible, from the outside ; a, hinge ; b, margo masticatorius. Cam. luc. x 55 diam. 
Fig. 3. Upper part of left mandible ; a, hinge ; b, facet beneath the hinge. Cam. luc. x 55 diam. 
Fig. 4. Two median teeth, from beneath. Cam. luc. x 350 diam. 
Fig. 5. A median tooth, from the side. Cam. luc. x 350 diam. 
Fig. 6. Median teeth, from the side. Cam. luc. x 350 diam. 
Fig. 7. Median portion of radula, from above ; a, median ; b, b, first lateral ; c, fifth lateral tooth. Cam . 
luc. x 750 diam. 
Fig. 8. Outermost part of two series, with 4-5 teeth ; a, a, outermost ; c, fifth. Cam. luc. x 750 diam. 
Fig. 9. Digestive tract from beneath ; a, oesophagus ; b, first stomach ; c, c, two anterior liver masses with 
their ducts ; d, main liver mass, e, its duct ; /, second stomach ; g, first part of intestine ; 
h, constriction dividing it from the second portion, ik. 
Fig. 10. Series of chitinous prickles from the second stomach. Cam. luc. x 100 diam. 
Fig. 11. End of prickle. Cam. luc. x 350 diam. 
Fig. 12. End of a renal tubule. Cam. luc. x 100 diam. 
Fig. 13. Hermaphrodite gland ; a, efferent duct of this aud another gland. 
Fig. 14. Onchidium verruculatum, Cuvier. 
Fig. 14. Dorsal tubercle with group of eyes. 
Figs. 15-22. Janolus australis, Bergh. 
Fig. 15. Bulbus pharyngeus, from the side ; a, musculus transversus postero-superior ; b, hinge part 
of mandibles ; c, oesophagus. 
Fig. 16. Left mandible, from the outer side; a, hinge part; b, margo masticatorius. 
Fig. 17. The same, from the inner side ; a and b, as above. 
Fig. 18. The same, from beneath ; a, anterior end ; b, margo masticatorius, 
Fig. 19. a, Tongue ; b, tectum raduke ; c, vagina raduke ; d, common muscular mass of the jaws. 
Fig. 20. a, Median tooth from below ; b, first lateral tooth from the side ; c, cuticular continuation of 
teeth. Cam. luc. x 350 diam. 
Fi". 21. Abnormal lateral tooth. Cam. luc. x 350 diam. 
O 
Fig. 22. Outer part of two series of teeth, with eight and seven teeth ; a, a, outermost teeth. Cam. 
luc. x 350 diam. 
