532 MANUAL OF THE MOLLUSCA. 



PLATE XIII. 



The real size of each, species is indicated "by tlie accompaiiyiiig line. 



DorkUdce. 



Page 



1. Doris Jolmstoni, A. and H. Brit, (low water) 328 



2. Goniodoris nodosa, Mont. sp. Brit 330 



3. Triopa claAdger, Miill. sp. Brit 330 



4. ^girus punctilucens, D'Orb. Brit 330 



5. Polycera quadrilineata, Mlill. sp. Europe. (Laminarian zone) 330 



6. Idalia aspersa, A. and H. Kortliuniberland 331 



TritoniadcB. 



7. Tritonia jDlebeia, Jolinst. Brit. (Coralline zone) 332 



8. Scyllgea pelagica, L. Devon (pelagic) 333 



9. Tethys fimbriata, L. Medit. (pelagic) 333 



10. Dendronotus arborescens, Miill. sp. Brit 334 



11. Doto coronata, Gm. sp. Brit 334 



12. Lomanotus marmoratus, A. and H. Deyonsbire coast 334 



^oUdidcB. 



13. JEolis coronata, Forbes. Brit. (Laminarian zone) 335 



14. Glaucus AtlanticTis, Bl. Gulf-weed banks 336 



15. Embletonia pulchra, A. and H. N. Brit 336 



16. Proctonotus mucroniferus, A. and H. Dublin Bay 337 



17. HermEea bifida, Mont. Brit. Lit. — Laminarian zone 338 



18. Alderia modesta, Loven. Brit. Salt-marsbes 338 



Elysiadce. 



19. Elysia viridis, Mont. sp. Brit 339 



20. Actconia corrugata (bead), A. and H. Ealmoutb. 339 



21. Cenia Cocksii, A. and H. Ealmoutb 339 



22. Limapontia nigra, Jobnst. Brit 340 



