(134) 



Plate IX. 



Melibe rosea. Rang. 



FIG. 



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



a, nodules. 



2. Epinotidium. 



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



c, CESophagus. 



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. a, (Esophagus ; 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. 



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



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



Marsenia capensis, B. 



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



14. Median plate. 



15 Median plate from a larger individual. 

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



16. The penis. 



Marsenia leptoconcha, B. 



17. Mandible. 9/1. 



18. Median plate. 200 x , 

 xQ. End of the rasp-sheath. 

 20. The penis. 



