8 ARKIV FÖR ZOOLOGI. BAND 7. NIO -1:. 



Trichotropis borealis Broderif & Sowerby. 



Arnanes, 25 fms, 6 sps., max. height 14 — Berufjord, 

 9 — 33 fms, numerous sps., max. h. 16,2 — Hofsos, 40 fms, 

 clay, 2 sps., max. h. 18 — Raufarhofn, 40 fms, 1 sp., h. 9,^ 

 — Reykiavik, 8 fms, stones, 2 sps.; max. h. 11 — Öfjord, 

 2 sps., max. h. 14. — Stated by Jeffreys from Iceland and 

 mentioned by Torell (1859). 



Lacuiia divaricata (Fabricius). 



Berufjord, 3 fms, ebb, rocks, numerous sps., max. h. 11 



— D:o, 9 — 40 fms, rocks, sand with shells, corals, numerous 

 sps., max. h. 9,2 — Hofsos, 40 fms, clay, 4 sps., max. h. 8, -t 



— Raufarhofn, 35 fms, many sps., max. li. 7 — Reykiavik, 

 8 fms, stones, many sps., max. h. 7,7 — Siglafjord, 12 fms, 

 18 sps., max. h. 11 — Thistilfjord, 10 — 16 fms, clay, sand, 

 7 sps., max. h. 7,8. — Stated by Jeffreys from Iceland. 



Lacuiia pallidula (Da Costa). 



Berufjord, 3 fms, ebb, 1 sp., diameter 5,2. — Stated by 

 Jeffreys from Iceland. 



Littoriiia palliata Say. 



Berufjord, in the surface of the water, 5 sps., max. h. 

 10; these species are of a yellow colour and therefore resemble 

 L. obtusata, but the spire is pointed and the shell finely 

 sculptured by spiral strise, which shows their belonging to 

 the present species. — Raufarhofn, 25 fms, 1 sp., h. 3,5; co- 

 lour brown, white-marbled. 



' Littoriiia riidis (Donovan). 



Fig. 1—4. 



Berufjord, 3 fms, ebb, clay, 8 sps., much elevated, max. 

 height 20,5 — Siglafjord, in the surface of the water, many 

 sps., max. h. 14,4 — Iceland without definite locality, many sps. 



