44 NILS ODHNEE, NORTHERN AND ARCTIC INVBRTEBKATES. III. OPISTHOBRANCHIA ETC. 



(licueral (listnbiitiou: 



Norway: Vadsö 50 — 60 fms; Tromsö 10—15 fms (G. O. Särs 1878); Tromsö; 

 Hammerfest 20 fms (Friele & Grieg 1901). — North Atlantic, 2 local. 125—148 fms 

 (Friele & Grieg 1901). — Bear Island 18 fms (Friele & Grieg 1901). — Spitzbergen, 

 the west coast 299 m (Friele & Grieg 1901; Knipowitsch 1901, 1902). — Mnrman 

 coast (Pfeffer 1889; Herzenstein 1893). — White Sea (Knipowitscli 1896). — Behring 

 Strait and Sea (Krause 1885). — Aleutian Islands (Krause 1885). — Parry Islands 

 (Reeve 1855). - Nova Scotia; Gnlf of Main (Whiteaves 1901). Depths 5—299 m. 

 Sand, clay. 



var. turrita (Möller 1842) 

 (incl. var. elongata Lbche 1878). 



Habifat: 



The Kära Sea: Leche (1878), incl. var. elongata, 5 — 12 fms, sand. 

 North of Siberia: Aurivillius (1887, R. obtusa), 5—8 fms, clay and sand. 

 Spitzbergen: Bel Sound, 30—40 fms (Loven), together with the type. 

 Greenland: Posselt (1898) 5—30 fms. 



Baffin Bay: 72° 38' N. 77° 10' W. 25—35 m, härd inud (1894), together with 

 the type. 



Geueral distribution: 



White Sea 142 m (Knipowitsch 1896). — Beliring Sea (Krause 1885). — Off the 

 Channel and Shetland, 20—85 fms (Jeffreys 1867; Utriculus obtusus var. Lajonkaire- 

 ana). Depths 3 — 142 m. Sand, clay. 



Retusa obtusa (Montagu 1803). 



Habitat:! 



The Baltic: Gotland. Badelundsviken, 2 — 3 fms alg* ("A 1882, Kolmodin) 2 

 shs. — 7 miles E. by S. of Svaneke, Bornholm, 38 fms clay (Kolmodin) 9 shs. — 

 6' 30" N. N. E. of Svaneke, 35—37 fms, sand and clay ('V, 1872, Kolmodin) 35 sps. 



— 1 mile N. N. E. of Kristians ö, E. of Bornholm, 50 fms, clay (V7 1882, Kolmo- 

 din) 25 shs. — 5' E. by S. of Nexö, Bornholm, 40 fms, clay (1882, Kolmodin) 1 sp. 



— 5' N.W. of Rönne, Bornholm, 24 fms, sand ('V. 1882, Kolmodin) 9 shs. — 11' 

 N.N.W. of Rönne, 27 fms, sand ("/„ 1882, Kolmodin) 1 sh. — 7 miles N.N.W. of Rönne, 

 25 fms, sand and clay ("Vo 1882, Kolmodin) 1 sh. — 6' from Kungsholmen. Karls- 

 krona, 23 fms, sand and clay ('Vy 1882, Kolmodin) 2 shs. — 55° 43' N. 16° 14' E., 

 45 fms, clay (June 1871, Öberg) 5 sps. — 54° 57' N. 13° 42' E., 25 fms, mud (July 

 1871, Öberg) 25 shs. — 54° 55' N. 13° 12' E., 24 fms, mud ('A 1871. Öberg) 2 sps. 



^ The Utriculus obtusus iiH^itioued liy Aukivtluus LS.S7 (fniiii Jug'ui- sliarr) is a lietusa pertenuis var. 

 turrita, whicli see. 



