178 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
temp. + 2? C. (Sp. Exp. "/. 1898) 1 sh., h. 2; ap. 1.25; d. 2.2; wh. 3 '/2s (differing from 
the type by the body whorl being somewhat flattened towards the suture and the 
aperture therefore subangular above). 
General Distribution: 
Norway: Lofoten, 80—100 fms (G. O. Sars 1878). — Nordland, shs (Krause 
1887). — Klosterelv and Bog Fiord, East Finmark (Norman 1902). — W. off Nor- 
way, Norwegian North-Atlantic Exp. St. 87 and 33, 484—510 fms (Friele 1877), St. 
ål, 173 b, 192 and 195, 107—650 fms (Friele 1886). 
Cyclostrema levigatum (JEFFREYS) G. O. SaArRs 1878. 
Habitat: 
Spitzbergen, King Charles Land, Bremer Sound between the Islands, 100—110 
m, bottom temp. — 1.45”, fine clay with big stones, Biloculina sparse (Sp. Exp. ”/s 
1898) 1 sh., fragmentary, probably belonging to this species. 
General Distribution: 
Norway, Lofoten southwards to 200 fms (d. 1.8; G. O. Sars 1878); Nordland 
(Krause 1887); Florö, Bergen, 20 fms (Friele 1876, and 1886 = C. trochoide, Friele 
1876). — Between Hebrides and Faroe Isles, 189—229 fms (Jeffreys 1883). — N. of 
Hebrides, 240 m, dead shs (Simpson 1910). 
Adeorbis fragilis G. O. SaArs 1878. 
Distribution: Lofoten, 60—80 fms, and west coast, dead shs (G. 0. Sars 1878). — W. and S. off 
Portugal, 322—994 fms (Jeffreys 1885, Nobre 1905). 
Archyt&ea delicatum Puririppi 1844. 
Distribution: Lofoten, 200—300 fms, 1 sh. (G. O. Sars 1878). — Azores, 1828 m (Dautzenberg 1889). 
var. expansa G. O. SARS 1878. 
Distribution: Lofoten, 200—300 fms, 1 sh. together with the type (G. 0. Sars 1878). 
