120 PROCEEDINGS OF THE ACADEMY OF [1880. 



Lamellidoris hilamellata (L.) var. Pacifica. 



3. Part of tlie branchial area with (aa) some branchial leaves ; 66, 



some of the larger surrounding tubercles. In the centre 

 the anal nipple, the renal pore and interbranchial tubercles. 



4. The Slicking crop, from the edge. 



5. The half of the same, from the inside ; a, stalk. 



6. a, spermafotheca ; 6, spermatocysta ; c, duct of the last ; d, 



duct to the mucous gland ; e, vagina. 



7. a, two median pseudo-plates ; 6, a latei'al plate ; cc, three 



external plates,* -^-f^. 



8. External plate from the side,* ^f^. 



9. Two of the foremost lateral plates with blunted end,* -^-|^. 



Lamellidoris muricata (Miiller). 



10. a, Median pseudo-plate shining through the left of the lateral 



plates, 66 ; c, three external plates,* ^f ^. 



11. aa, Basal edge of three lateral plates ; 6, external plates,* ^4^. 



12. a, Glans penis ; 66, praeputium ; e, spermatoduct,* J^f^. 



Lamellidoris varians, Bergh. 



13. Lateral plate from the side,* ^f^. 



14. Median pseudo-plate, from above,* -^f^. 



Adalaria Pacijica, Bergh. 



15. Innermost part of two rows of external plates,* -f-; a, two 



innermost; 6, the third failing (in the anterior row); c, 

 eighth. 



Plate IV (XII). 



Acanthodoris pilosa (0. F. Miiller), var. purpurea. 



1. Labial disk, with (a) the lancet-formed blades projecting in 



the lowest part of the mouth proper. 



2. The lancet-formed blades (a) with the adjoining part (6) of 



the armature of the mouth,* J-^^. 



3. a. The right lancet-formed blade ; 6, the adjoining part of the 



armature,* ^^^. 



4. Elements of the armature,* ^^^. 



5. Lateral plate, from the side,* -^f^. 



