(120 



Plate II. 

 Aplysia gaegantua, B. 



FIG 



1. a, OEsophagus ; b, first stomach ; c, masticatory stomacli ; a, tliird 



stomach; e, intestine. 



Aplysia monochkoa, B. 



2. The shell from beneath. 2/1. 



3. The penis with a, the prostata ('?). 



4. Median plates. 



5. First lateral plate. 



6. Outer end of a series, a, outermost plate. 



7. Outer end of two series, aa, outermost plate. 



(Figs. 4-7 drawn by Cam. 200 x .) 



Aplysia lolsata, B. 



8. The shell, from beneath. 2/1. 



9. Elements of the mandible. 



10. Median and first lateral plate. 



11. Outer end of a series, a, outermost plate. 



(Figs. 10-12 drawn by Cam. 200 x . ) 



12. The penis. 



Aplysia Woodii, B 



13. The hinder end of the sole of the foot. 



14. The shell from beneath. 3/1. 



15. Elements of mandible. 



16. Median plate. 



17. A lateral plate. 



18. The ninth plate from the outer end of a scries. 



19. Outer end of a series, a, outermost plate. 



(Figs. 15-19 drawn by Cam. 350 x .) 



Aplysia poikilia, B. 



20. Elements of mandible. 



21. Hooks of the palate. 



(Figs. 20-21 drawn by Cam. 350 x .) 



