8. Scyllcea pelagica seen on the side of the belly. 



9. Scyllcea pelagica suspended to a branch of the Fucus natans, 



10. Phjllidia trilineata seen on the upper side. 

 aa. The indentations for the upper tentacula. 

 b. .. .. of the anus. 



11. An upper tentaculum magnified. 



42. Thyllidia trilineata seen underneath. 



aa. The inferior tentacula, between which is the mouth. 



b. branchiae of the left side. 



c. .. orifice of generation. 



13. A Limax seen on the right side, the tentacula half developed. 

 aa. The great tentacula. 

 bb. .. smaller .. 



c. .. mouth, between which and the small tentacula are seen the 



papilla of the upper lip. 

 dd. . . foot 



e. .. posterior point of the back, whence issues the mucosity by 



which it suspends itself. 



f. .. mantle. 



g. .. orifice for respiration. 



h. , .. .. generation. 



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