50 NILS ODHNER, NORTHERN AND ARCTIC INVBRTEBRATES. III. OPISTHOBRANCHIA ETC. 



The White Sea: Solowetzkij Island (1893, Jacobson) 3 sps. 



The Kära Sea: Leche (1878). 



North of Siberia: xlurivillius (1887), 5 — 8 fms, clay, sand. 



Spitzbergen: Horn Sound, 40—60 fms, clay and stones, 5 sps. — Advent Bay, 

 20—40 fms, clay (Vs 1868) 4 sps. — Danes Gat, 7—10 fms, stones and algse' ('V» 

 1868) 1 sp. - Mossel Bay, 9V2 fms, alg* (V. 1872) 1 sp.; D:o TA fms algee ('V.-, 

 1872) c. 30 sps.: D:o 9V-. fms, sand ('V2 1872) c. 20 sps. — Treurenberg Bay, 12 — 20 

 fms, sand and clay (1861) 1 sp. — Lomme Bay, 25—35 fms, clay (7& 1868) c. 30 

 sps. — N. E. of the Seven Islands, 81° 14' N. 22° 50' E., 150 m, gray mud, bottom 

 temp. + 2° C. ('"A 1898) 3 shs. — Bremer Sound, King Charles' Land, 100—110 m, 

 fine clay with great stones, bottom temp. — 1,45° C. (Vs 1898) 6 sps. — N. of Hope 

 Island, 77° 25' N. 27° 30' E., 160 m yellowish brown clay, bottom temp. — l,7i° C. 

 ("Ve 1898) 4 shs. 



Greenland: Posselt (1898) 5 — 150 fms, clay, sand, stones. Further: Upernivik, 

 70 fms, 1 sh. - 53° 34' N. 52° 1' W., 980 fms, light gray clay with stones (1871) 

 1 white sh. - 63° 35' N. 52° 57' W., 43 fms, sand and shells' (1871) 2 shs. (= C. 

 alba in Posselt). 



Baffin Bay: 72° 27' N. 74° 52' W., 20 m mud (1894) 4 sps. 



East Greenland: Mackenzie Bay, 1 sp. and 1 sh. (Mus. U., Hägg 1905). 



General (listributioii: 



Norway: Finmarken, 30—40 fms, very common; the whole coast (G. O. Särs 

 1878). — White Sea (Knipowitsch 1896). — Spitzbergen (Pf ef f er 1895; Krause 1892; 

 Knipowitsch 1901, 1902; Friele & Grieg 1901). - Franz-Joseph Land (Melville & 

 Stånden 1900). — Kära Sea (Collin 1887). — Grinnell Land (Verkriizen 1878). — 

 Parry Islands (Sutherland 1852). — East Canada (Whiteaves 1901). Depths up to 

 267 m (Friele & Grieg 1901). Clay. sand, algas. 



Cylichna insculpta (Totten 1835) 

 (incl. var. valida Leche 1878). 



Habitat: 



Kära Sea: Leche (1878, var. valida), 8 — 10 fms, sand. 



North of Siberia: Aurivillius (1887. var. valida), 5 — 10 fms, sand, stones. 



Spitzbergen: Bel Sound 5 — 12 fms (Torell) 13 sps. (one of a dark-brown colour) 

 — Advent Bay, 20—40 fms, clay ('/« 1868) 12 sps. (together with C. scalpta and C. 

 Reinhardti). — Ice Fjord, 5 fms, clay, c. 20 sps. — Cross Bay, 60 fms, clay mixed 

 with stones (1861) 2 sps. — Treurenberg Bay, 12—20 fms, sand and clay (1861) 

 5 sps. 



Greenland: Posselt (1898), 70 fms. 



