116 



NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. III. OPISTHOBKANCHIA ETC. 



¥ig. 



1. 



Fig. 



■2. 



Fig. 



3. 



Fig. 



4. 



Fig. 



5. 



Fig. 



6. 



Fig. 



7. 



Fig. 



8 (13 a) 



Fig. 



9 (30). 



Fig. 



10. 



Fig. 



11. 



Fig. 



12 (16). 



Fig. 



13 (16a) 



Fig. 



14 (16 b) 



Fig. 



15. 



Fig. 



16 (26). 



Fig. 



17 (44). 



Fig. 



18 (31). 



Fig. 



19 (21). 



Fig. 



20 (48 a) 



Fig. 



21 (52). 



Fig. 



22. 



Fig. 



23 (34). 



Fig. 



24. 



Fig. 



25 (49). 



Fig. 



26 (50). 



Fig. 



27. 



Plate II. 



The nurnerals in parentheses refer to Ind. Moll Scand. (Loven 1846). 



Acera buUata Muller, animal with shell. 



The same, shell. 



The same, egg-cocoon. 



Aplysia rosea Rathke (= punctata Cuvier). 



The same, a younger specimen. 



The same, shell. 



The same, spawn on Fvircellaria. 



Archidoris tubereulata Cuvier. 



Aegires punctilucens Loven from above. 



The same from tlie left. 



Dendronotus sp. aberrant form (monstrosity?). 



Acanthodoris pilosa var. fusca Loven. 



Acanthodoris pilosa Miiller, the type. 



The same. 



The same. 



Palio Lessoni d'Orbigny (= modesta Loven). 



Galvina tricolor Forbes. 



Tritonia Hombergi Cuvier. 



Idalia pulchella var. fusca (= I. cirrjgera Phil. of Loven). 



Cutliona nana (under Eolis bellula in Lo^-én). 



Plenrophyllidia Lovéni Bergh (= Diphyllidia lineata Otto of Loven). 



The same from the right. 



Doto coronata Gmelin. 



Papilla of the same. 



Alderia modesta Lo-vén. 



Elysia viridis Montagu (= Placobranchvis v. Huss. Qiioy & Gaim of Loven). 



The same from the left. 



