(122) 



Plate III. 



ApLYSIA I'OIKILIA, B. 

 FIG. 



1. The shell from beneath. 2/1. 

 '2. ^ledian plate. 



3. Fifth lateral plate, from within. 



4. A lateral plate. 



Al'LYSIA ECSIPHONATA, B. 



5. The mantle shield, from above, with slpho. 

 G. The same, from the right side. 



7. P]lenients from the mandible. 



8. Hooks of the palate. 



9. IMedian plates of two series. 



10. One of the interior lateral plates. 

 11 and 12. Largest lateral plates. 



13. Outer end of a series of plates, a, outermost. 



(Figs. 2-13 drawn by Cam. 200 x .) 



14. Stomachal plates. 55 x. 



15. Penis. 



.\CLKSIA CIRRHIFEBA, Q. et Ci. 



16. Mantle region. «, rudiment of mantle ; b, branchia ; c, anus. 



17. JIandible. 



18. Elements of mandible. 350 x . 



19. Piece of the palate plate. 350 x . 



20. Anterior end of the bulbus pharyngeus with the rasp. 



21. Median and first lateral plates. 350 x. 



22. The penis. 



23. Theglans. 



24. Hook of the penis. 350 x. 



