198 Prof. C. Mobius on the Mollusca &c. of the 



MOLLUSCA. 

 Gasteropoda. 



1. Chiton albus^ Linn. Length 15, breadth 8 millims. 



Distr. Spitzbergen to the Cattegat and Britain, Massa- 

 chusetts {Gould^ Binney). Down to 550 fathoms. 



2. Lepeta cceca^ Mtill. Length 11, breadth 8, height 5 millims. 



Walrus Island, 25 fathoms. 



Distr. Circumpolar ; Sitka, North Japan {Schreyick), 

 Spitzbergen to the Cattegat and Britain. 



3. Trochus grcenlandtcuSy Chemn. Length 13, breadth 15 

 millims. 



Sabine Island, Jackson Island, North Shannon Island, 

 Germania Harbour ; 2-30 fathoms. 



Distr. Labrador to Massachusetts ; White Sea to the 

 Cattegat and Britain. 



4. Trochus helicinus, Fab. Length 15, breadth 20 millims. 



Sabine Island, Jackson Island, North Shannon Island ; 

 Wabus Island ; 4-27 fathoms. 



Distr. Circumpolar ; Massachusetts, Japanese seas, Nor- 

 way to the Cattegat and Britain. 



5. Pleurotoma ])yramidalis^ Strom. Length 12, breadth 6 

 millims. 



Sabine Island, Jackson Island, Shannon Island ; 4-30 

 fathoms. 



Distr. Greenland to Massachusetts, Spitzbergen to Nor- 

 way (Bergen). 



6. Fusus propinquus^ Alder. Length 72, breadth 33 millims. 



Sabine Island, Clavering Island, Germania Harbour ; 

 2-20 fathoms. 



Distr. Russian arctic coast to the Cattegat and Ireland. 



7. Buccinum undatimij Linn. Length 42, breadth 30 millims. 



Jackson Island, Clavering Island ; 4 fathoms. 



Distr. Circumpolar ; European and North-American 

 coasts of the North Atlantic, Mediterranean, Sea of 

 Ochotsk. 



8. Scalaria groenlandica, Chemn. Length 30 millims. 



North Shannon Island, 30 fathoms. 

 Distr. Arctic Ocean, Norway to Bergen. 



9. Naticaclausa,^vod. & Sow. Length 29, breadth 20 millims. 



North Shannon Island, Sabine Island, Jackson Island, 

 Clavering shore ; 30 fathoms. 



Distr. Circumpolar ; Japanese sea, Finmark. 



10. Cylichna cylindracea., Penn. Length 19, breadth 4*5 

 . millims. 



