MANUAL OF THE MOLLUSCA. 13 



PLATE XIII. 



The real size of each species is indicated by the accompanying line. 

 Doridida, 



PAGE 



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



2. Goniodoris nodosa, Mont. sp. Brit ..................................... 191 



3. Triopa clavigera, Mull. sp. Brit ........................................ 191 



4. jJEgirus punctilucens, D'Orb. Brit ............................. , ....... 191 



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



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



TritoniacJce. 



7. Trilonia plebeia, Jolinst. Brit. (Coralline zone) .................. 192 



8. Scyllsca pelagica, L. Devon (pelagic) ................................. 193 



9. Tethys fimbriata, L. Medit. (pelagic) ................................. 393 



0. Dendronotus arborescens, Miill. sp. Brit ............................ ] 93 



1. Doto coronata, Gm. sp, Brit ........................ ................... 193 



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



.3. JEolis coronata, Forbes. Brit. (Laminarian zone) .................. 194 



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



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



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



.7. Hermrea bifida, Mont. Brit. Lit. Lamiuarian zone ....... . ....... 196 



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



Ehjsiadce. 



9. Elysia viridis, Mont. sp. Brit ........................................... 197 



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



1. Cenia Cocksii, A. and H. Falmouth ................................. 197 



2. Limapontia nigra, Johnst. Brit ......................... , .............. 197 



