122 PROCEEDINGS OF THE ACADEMY OF [1880. 



Acanthodoris pilosa (M.). 



5. a, spermatotheca ; b, spermatocysta ; c, duct to the mucous 



gland ; dd, duct to the vagina, 



Acanthodoris csei'ulescens, Bergh. 



6. Part of the armature of the mouth,* ^f^. 



7. External plates, from the side ;* -^^f^ a, innermost. 



Chromodoris Dalli^ Bergh. 



8. The upper part of a branchial l^af,* J-^-^-. 



9. Part of the lip-plate, from above,* ^f^. 



10. Elements of the lip-plate,* ^K 



11. Part of the rhachis, with three (bosses or) false plates,* ^p. 



12. a, false plate, obliquely, from the side,* -^f^. 



13. The 13th plate, from the side,* -if^. 



14. The 9th plate, from the side,* ^^. 



Triopa clavigera (0. Fr. Miiller). 



15. Tubercles of the back. 



16. Vertical section of one of the appendices of the back ; a, bag 



at the point. 

 n. Elements of this last bag. 



18. Spicula of the skin.* 



1 9. Lowest part of the mouth, with its cuticula ; a, the free 



margin,* ^f^. 



20. Hindermost part of the bulbus ; a, tongue; 6, sheath of the 



radula. 

 / 



Plate YI (XIV). 



Chromodoris Dalli^ Bergh. 



1. The buccal (a) and gastro-oesophageal (b) ganglia,* ^s., 



2. Part of the median portion of the radula ; a, false plates, on 



each side the 2-3 innermost (lateral) plates,* ^^. 



3. Outer part of two series of plates with 11 plates; a, outer- 



most; b, eighteenth,* ^f^. 



4. a, spermatotheca ; b, spermatocysta; c, duct to the vagina; 



d, duct to the mucous gland,* ^^-. 



