XV 



Pag. 



Placopliora. 



Chiton (Lepidopleums) cinereus, Linné 107. 



1. — — arcticus, G. O. Sars 107. 



2. — (Lophyriis) albus, Linné 107. 



3. — (Craspedocliiliis) marginatus, Pennant 109. 



4. — (Boreochiton) ruber, Lowe 110. 



5. — -^ marmoreus, Fabricius 111. 



Gastropoda. 



1. Acmaea testudinalis, (Müller) 114. 



2. Tectura rubella, (Fabricius) 115. 



3. Lepeta caeca, (Müller) . 117. 



4. Puncturella Noachina, (Linné) 119. 



o. Scissurella crispata, Fleming 120. 



6. Moelleria costulata, (Møller) 121. 



7. Margarita helicina, (Phipps) 122. 



8. — Vahlii, Møller 124. 



9. — olivacea, (Brown) 124. 



10. — groenlandica, (Chemnitz) 126. 



11. — cinerea, (Couthouy) 129. 



— (Machaeroplax) bella, Verkrüzen 132. 



Trochus occidentalis, Mighels et Adams 132. 



12. Pilidium radiatum, (M. Sars) 132. 



13. Velutina laevigata, (Pennant) . „ . . 133. 



14. — lanigera, Møller 134. 



— (Velutella) flexilis, (Montagu) 135. 



15. — (Morvillia) zonata, Gould 135. 



16. Marsenina micromphala, Bergh . 136. 



17. — groenlandica, Bergh 137. 



18. Onchidiopsis groenlandica, Bergh 137. 



19. Amaura Candida, Møller 138. 



20. Amauropsis islandica, (Gmelin) 138. 



21. Natica (Lunatia) groenlandica, (Beck) Møller 139. 



22. — — nana. Møller 141. 



23. — affinis, (Gmehn) 142. 



24. — sphaeroides. Jeffreys 144. 



25. Belå harpularia, (Couthouy) 144. 



26. — Woodiana, (Møller) 145. 



