MANUAL OF THE MOLLUSCA. 13 



PLATE XIII. 



The real size of eacli species is iudicated by the accompanying line. 

 Dorididce. 



PAGE 



1. Doris Johnstoni, A. and H. Brit, (low-water) 190 



2. Goniodoris nodosa, Mont. sp. Brit 191 



3. Triopa clavigera, Miill. sp. Brit 191 



4. ^girus punctiluceus, D'Orb. Brit 191 



5. Polycera quadrilineata, Miill. sp. Europe. (Laminarian zone) 191 



6. Idalia aspersa, A. and H. Northumberland 192 



Tritoniada:. 



7. Tritonia plebeia, Johnst. Brit. (Coralline zoile) 192 



8. Scylla:-a pelagica, L. Devon (pelagic) 193 



9. Tethys fimbriata, L. Medit. (pelagic) 193 



1 0. Dendronotus arborescens, MuU. sp. Brit 193 



11. Doto coronata, Gm. sp, Brit 193 



12. Lomanotus marmoratus, A. and H. Devonshire coast 194 



JEoVulidcE. 



13. iEolis coronata, Forbes. Brit. (Laminarian zone) 194 



14. Glaucus Atlanticus, Bl. Gulf -weed banks 195 



15. Embletonia pulchra, A. and H. N.Brit 195 



16. Proctonotus mucroniferus, A. and H. Dublin Bay 195 



17. Hernifca bifida, Mont. Brit. Lit. — Laminarian zone 196 



18. Alderia modesta, Loven. Brit. Salt-marshes 196 



Elysladcp. 



19. Elysia viridis, Mont. sp. Brit 197 



20. Acteonia corrugata (head) A. and H.. Falmouth 197 



2L Cenia Cocksii, A. and H. Falmouth 197 



22. Limax)ontia nigra, Johnst. Brit 197 



