90 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
Fig. 17. The same, Berufjord, Iceland. 
Fig. 18. The same, var. umbilicalis, Kobbe Bay, Spitzbergen. 
Fig. 19. The same, var. umbilicalis, Hinlopen Strait, 10—25 fms. 
Fig. 20. The same, type and var. levigata, Bel Sound, 30—40 fms. 
Fig. 21. The same, var. levigata, Kostin Sharr. 
Fig. 22. The same, var. rudis, Kostin Sharr. 
Fig. 23. The same, type, Hackluyts Headland, Spitzbergen. 
Fig. 24. The same, var. undulata, Finmark (Sparre Schneider). 
Fig. 25. The same, var. undulata, Kjosen, Finmark. 
Fig. 26. The same, var. l&evior, Bergen. 
Fig. 27. The same, var, umbilicalis, Bodybet, 60—70 fms, from aperture and from above. 
Fig. 28. Margarita cinerea, forma typica, Godthaab, Greenland. 
Fig. 29. The same, forma typica, Godhavn. 
Fig. 30. The same, forma multilirata, Pröven, Greenland. 
Fig. 31. The same, forma typica, Kvalsund, Finmark. 
Fig. 32. The same, var. striata, Liefde Bay, Spitzbergen, 5 fms. 
Fig. 33. The same, forma typica, Berufjord, Iceland (Torell). 
Fig. 34. The same, forma multilirata, Pröven, Greenland. 
Fig. 35. The same, var. striata, Berufjord, Iceland (Torell). 
Fig. 36. The same, var. striata, Kostin Sharr. 
Fig. 37. 'The same, forma typica, Horn Sound, Spitzbergen. 
Plate 5. 
Figs. 1—47. 
Fig. 1. Margarita cinerea var. striata, Treurenburg Bay, Spitzbergen. 
Fig. 2. The same, var. striata, Behring Sea (Vega Exp.) 
Fig. 3. The same, forma typica, Finmark (Sparre Schneider). 
Fig. 4. The same, forma typica, Finmark (Lovén). 
Fig. 5. The same, forma typica, Grötsund. 
Fig. 6. Solariella varicosa (Mighels & Adams), Subowski, Kola; nat. size and Xx 2.3. 
Fig. 7. The same, Vadsö, Norway- 
Fig. 8. 'The same, Murman Coast (Herzenstein). 
Fig. 9. The same, Cape Grebeni, Nova Zembla. 
Fig. 10. The same, Waidaguba, Kola. 
Fig. 11. The same, Newfoundland. 
Fig. 12. 'Phe same, Matotschkin Sharr, Nova Zembla. 
Fig. 13. The same, Treurenburg Bay, Spitzbergen. 
Fig. 14. The same, Hackluyts Headland. 
Fig. 15. Solariella obscura (Couthouy), transition to var. bella, Solowetskij Island, White Sea, 2 sps., nat. size and X 2.5. 
Fig. 16. The same, Cape Grebeni, Nova Zembla. 
Fig. 17. The same, var. intermedia, Norwegian Island, Spitzbergen. 
Fig. 18. The same, NW. Atlantic (the same sp. on light and dark ground). 
Fig. 19. The same, 62” 39! N., 177” 5' W. (Vega Exp. N:o 1068). 
Fig. 20. The same, var. albula Gould, Kola Peninsula, Waidaguba, 
Fig. 21. The same, Vega Exp., winter harbour. 
Fig. 22. The same, NE. coast of N. America, nat. size and X 2.3. 
Fig. 23. The same, var. intermedia, Vega Exp., 2 miles N. of the winter harbour. 
Fig. 24. The same, var. islandica, Hofsos, Tceland, nat. size and X 2.3. 
Fig. 25. The same, var. bella, Lofoten, nat. size and X 2.5. 
Fig. 26. The same, var. bella, Grötsund, Finmark, nat. size and X 2.5. 
Fig. 27. The same, var. bella, Grötsund, another sh. 
Fig. 28. The same, var. multilirata n. var., Davis Strait, nat. size. 
Fig. 29. The same, var. multilirata n. var., Davis Strait, X 2.3. 
Fig. 30. The same as in the preceding figs., other sps., nat. size. 
Fig. 31. The same, var. bella, off Ice Fiord, nat. size and X 2.5. 
Fig. 32. The same, var. multilirata, transition to finmarchica, Godhavn, Greenland. 
