of the North Atlantic and of North-Western Euroiie. 735 



One specimen only of this species was taken in a tide-pool at Port St. Mary, 

 Isle of Man (G. S. B.). In general aspect, and more especially in its style of 

 surface-sculpture, it is not unlike Cythere marginata, but it lacks the tubercular 

 elevation over the anterior hinge-joint; the posterior ventral angle is prominent, 

 while in C. marginata that part is much cut away, and the outline, as seen from 

 above, is altogether different. On the hinge-Hne there is an appearance of crenu- 

 lation, which, together with the general outline of the shell, leads us to refer the 

 species provisionally to the genus Cytheridea. 



Cytheridea papillosa, T. R. Jones. 

 Distribution. — East Finmark, common (A. M. N.). 



Cytlieridea punctillata, Gr. S. Brady. 



Distribution. — Vadso ; Lang, Bog, and Klosterelv Fiords, in 5—100 fathoms 

 (A. M. N.). 



Cytlieridea Sorbyana, T. R. Jones. 



Distribution. — Fine living examples in Klosterelv Fiord, East Finmark, 

 5 fathoms (A. M. N.). 



Eucytliere declivis (Norman). 



Distribution. — In 0—25 fathoms, together with var. Argus^ G. 0. Sars ; East 

 Finmark (A. M. N.). 



Krithe bartonensis, T. R. Jones. 

 Distribution. — Vadso, in 5—15 fathoms. 



Loxoconch.a tamarindus, T. R. Jones. 



Distribution. — Living between tidemarks and in shallow water, Vadso and 

 Klosterelv Fiord (A. M. N.). 



Loxoconcha fragilis, G. 0. Sars. 



Distribution. — A single living specimen between tidemarks in Klosterelv Fiord 

 (A. M. K). 



Xestoleberis depressa, G. 0. Sars. 



Distribution. — East Finmark, common (A. M. N.). 



Cytherura afiB.nis, G. 0. Sars. 

 Distribution. — Shallow water, Vads5; and tidemarks, Klosterelv Fiord (A. M.N.). 



Cytherura sella, G. 0. Sars. 

 Distribution.-— Va^m, 20-30 fathoms (A. M. N.). 



5K2 



