42 NILS ODHNER. NORTHERN AND ARCTIC INVERTEBRATES. III. OPISTHOBRANCHIA ETC. 



— North Atlantic (Jetfreys 1870). — British coasts, Shetland (Forbes & Hanle}^ 

 1853; Jeffreys 1867). — Portugal (Nobre 1905). — Algiers, the harbour (Carus 1889). 



— Azores 1073 fms; Florida Channal; Culebra Island, West Indies; Pernambuco (Wat- 

 son 1886). — East coast of N. America 120—400 fms (Pilsbry 1893). Depths up to 

 1073 fms. Mud. 



Retusa umbilicata (Montagu 1803). 

 Ha I» i tat: 



West coast of SAveden: Bohuslän: ')Gullmarn (Loven) 7 shs.; D:o Gåsörännan 

 8 shs.; D:o Oxvik (AuriviHins 1894) 1 sh.; D:o off Bondhålet (Aurivillius) 2 sps.; 

 D:o Fiskebäckskil (Aurivillius 1894) 20 sps.; D:o Grötöhamn 2 sps.; "')Nordkoster 

 (Loven) 2 shs.; ") Lindö, near Kosterrännan, (Loven & Torell) 1 sh.; ') Väderöarna, 

 sand and clay (Goés 1862) 3 shs.: ")Skagerrack, 23 fms, clay and shells (Lindahl) 1 

 sh.; D:o 142 fms (Lindahl) 3 shs. 



Norway: Finmarken, Kalfjord 15 — 80 fms (Goés & Malmgren) 9 shs. 



(iieii<M'al (listrilmtioii: 



Norway: south and west coast to Lofoten 10-300 fms (G. O. Särs 1878). — 

 England and Ireland (Jeffreys 1867). — Kattegatt and Danish coast, 10—15 fms (Pe- 

 tersen 1888); Limfjorden (Mörch 1871). — France 1019 m (Vayssiére 1901). — Portugal 

 (Nobre 1905). — Vigo Bay; Gibraltar (M'Andrew 1852). — Mediterranean, Adriatic 

 and Aegean (Carus 1889). Depths up to 1019 m. Clay and sand. 



Retusa strigella (Loven 1846). 



Hal»ifat: 



GuUmarn, Bohuslän (Loven) 1 sh. 



(ieiieral distrihiitioii : 

 Norway: Kristianiaf jorden (Asbjörnsen 1854). — Sweden: off Göteborg (Malm 

 1858). ~ Scotland (Forbes & Hanley 1853). — Ireland (Nichols 1899). - Portugal 

 (Nobre 1905). — Mediterranean: coast of Piemont (Carus 1889). 



Retusa substriata (Jeffreys 1877). 



Dislrihiilioii: West (irpcnlanrl ö<l° lo' N. 50" 25' W,, 1750 fms 1 sh.. fragment (Jeffreys 1877). 



Retusa nitidula (Loven 1846). 



Hahitat: 



West coast of Sweden: Skåne, Kullen (Lilljeborg) 1 sh. — Halland, Varberg 

 (Torell) 3 slis. — Bohuslän: ')Vinga, Marstrand, 25 fms, sand and stones (Lindahl) 



