Second German North-Polar Voyage. 199 



Jackson Island, 4 fathoms. 



Distr. Finmark, Canaries, Mediterranean; 3-160 fathoms. 

 11. Clione limacina, Phips. Length 36 millims. 

 Distr. West Greenland, Massachusetts. 



Lamellibraxchia. 



1. Modiolaria discors, Linn. Length 26, height 16, breadth 

 11 millims. 



Shannon, Sabine, Clavering, and Jackson islands ; 4—30 

 fathoms. 



Distr. Circiimpolar ; Nortli-east of America, north 

 Japanese sea, Mediterranean, North Sea, Western Baltic. 



2. Cardium groenlandicum, Chemn. Length 70 millims. 



Distr. West Greenland, Massachusetts, Behring's Straits. 



3. Astarte horealis, Chemn. [A. arctica, Gould). Length 

 33-35, height 27, breadth 7-10 millims. 



Shannon, Sabine, Clavering, and Jackson islands ; 4-10 

 fathoms. 



Distr. Arctic seas, from Behring's Straits to Lapland, 

 Norway, Baltic to Bornholm. 



4. Astarte sulcata^ Da Costa. Length 25, height 18, breadth 

 10 millims. 



Distr. Circumpolar; Sea of Ochotsk, Canaries, North- 

 eastern America, bays of Kiel and Flensburg. 



5. Astarte compressa^ Mont. Length 14, height 12, breadth 

 7'5 millims. 



Jackson Island. 



Distr. Arctic seas. North-eastern America, Spitzbergen, 

 Norway, Britain, Kiel Bay. 



6. Astarte crehricostata^ Forbes. Length 28, height 22, 

 breadth 13 millims. 



Shannon Island, 30 fathoms. 



Distr. West Greenland, Norway, North-eastern America. 



7. Venus astartoidesy Beck. Length 16, height 12, breadth 7 

 millims. 



Shannon Island, Jackson Island ; 4-30 fathoms. 

 Distr. West Greenland, Massachusetts, seas of Ochotsk 

 and Japan. 



8. Ml/a truncata, Linn. 



Sabine Island, 10-20 fathoms. 



Distr. Circumpolar ; Sea of Ochotsk, North-eastern 

 America, Britain, Bay of Biscay, Norway, Western Baltic. 



9. Saxicava rugosa, Linn. Length 43, height 22 millims. 



Shannon Island, 30 fathoms. 



Distr. Circumpolar ; Japanese and Chinese seas, North- 



