— 598 — 



Arca glacialis, Gray. 



— pectunculoides, Scacchi. 

 Yoldia intermedia, Sars. 



— pygraœa, Munster. 



— frigida, Torell. 



— pernula, Moller. 



Cardium Groenlandicum, Cheranitz. 

 Astarte striata, Leach. 



— sulcata, Da Costa. 



— borealis, Chemnitz. 

 Axinus flexuosus, Montagu. 



— orbicularis. S. Wood. 

 Neaera arctica, M. Sars. 

 Thracia myopsis, Moller. 



— septentrionalis, Jeffreys. 

 Cyrtodaria siliqua, Chemnitz. 



Pieropoda. 



Limacina helicina, Gmelin. 



Clione limacina, Phipps. 

 Gasteropoda. 



Chiton ruber, Lowe. 



Lepeta cœca, Moller. 



Puncturella noachina, L 



Margarita helicina, Fabr. 



— Groenlandica, Chemn. 



Machaeroplax obscura, Couthouy. 



Rissoa scrobiculata, Moller. 



— Jan-Mayeni, Friele (nov. sp.j 

 Cerithium costulatum, Moller. 

 Trichotropis conica, Moller. 

 Cancellaria viridula, Fabricius. 

 Natica ciffinis, Gmelin. 



— pallida, Brod. 



