532 M.-y^UAL OF THE MOLLUSCA. 



PLATE XIII. 

 Tlie real size of each species is indicated by tlie accomj)anying line. 



Dorididce. 



Page 



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



2. Goniodoris nodosa, Mont. sp. Brit 330 



3. Triopa clavig-er, Miill. sp. Brit 330 



4. JEgirus punctilucens, D'Orb. Brit 330 



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



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



Tritoniadce. 



7. Tritonia plebeia, Jolmst. Brit. (Coralline zone) 332 



8. Scylla^a 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. Devonshire coast 334 



JEoUdidce. 



13. ^oHs coronata, Forbes. Brit. (Laminarian zone) 335 



14. Glaucns Atlanticus, Bl. Gnlf-weed banks . . . , 336 



15. Embletonia pulchi\a, A. and H. N. Brit 336 



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



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



18. Aldcria modcsta, Loven. Brit. Salt-marshes 338 



Elysiadce. 



19. Elysia viridis, Mont. sp. Brit 339 



20. Acteonia corrugata (head), A. and H. Ealmouth 339 



21. Conia Cocksii, A. and H. Falmouth 339 



22. Limapontia nigra, J ohnst. Brit 340 



