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Plate IX. 

 Melibe rosea, Rang. 



FIG. 



1. From the upper side of the cowl with the outer scries of cirrhi. 



a, nodules. 



2. Epinotidium. 



.3. Bulbus pharyngeuH with — a, mouth-tube; b, region of the mandibles; 

 c, cESophiigus. 



4. From the inside of mouth-tube. 350 x . 



5. The mandibles, from the fore-side, the left overlapping the right. 35 x. 



6. a, (Esophagus ; b, stomach with the plates shining through ; c, left 



biliary duct; d, pocket-like widenings near the pyloric part of c, 

 the intestine. 



7. «, G'isophagus ; b, stomach ; cc, biliary ducts. 



8 Surface of one of the nodules of an epinotidium. 

 9. Ramificated renal tube. 



10. End of a renal tube. 



11. Cells of a renal tube. 



(Figs. 10-11 by Cam. 350 x .) 



12. Last half of the glans penis. 55 x . 



M.\KSKXI.\ CAPENSIS, B. 



13. From the anterior margin of the mandible. 55 x. 



14. Median plate. 



15. Median plate from a hxrger individual. 



(Figs. 14-15 by Cam. 200 x .) 

 IG. The penis. 



Marsenia leptoconcha, B. 



17. JIandible. 9/1. 



18. IMedian plate. 200 x . 



19. End of the rasp-sheath. 



20. The penis. 



