7fi NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. III. OPISTHOBRANCHIA ETC. 



3 sps. (Mus. G.). - Dyngö, Fjällbacka (Hanson) 1 sp. - Väderöarna, coral bottom, 

 40—50 fms (July 1887) 1 sp. Kosterfjorden (July 1895, Aurivillius) 1 sp. 



General distribution: 



Norway: the west coast 5—20 fms (G. 0. Sars 1878). — British coasts (Jeffreys 

 1869). Sweden: ? Kullen (Lilljeborg 1851). Denmark (Mörch 1871). - Heligo- 

 land (Heincke 1894). — France (Vayssiere 1901). Depths to 50 fms. 



Groniodoris Danielsseni Friele & Hansen 1876. 



Distribution: Bergen, Norway, 20 — 30 fms (Friele & Hansen 1876). 



Idalia elegans Leuckart 1828. 



Distribution: Kullen, Sweden (Mörch 1*71 1. — Danish coast (Morel) 1871). — British roasts (Jeffreys 

 1869). — France (Vayssiere 1901). — Mediterranean and Adriatic (Carus 1889). Depths 15 fins (Jeffreys). 



Idalia pulchella Alder & Hancock 1855. 

 Habitat : 



Flatholmen, Gullmarn, Bohuslän (Loven) 4 sps. 



Genera] distribution : 



Norway: the west coast (Aalesund); Lofoten 200 fms (G. O. Sars 1878); Tromsö 

 (Krause 1895). British coasts (Jeffreys 1869). - Massachusetts (Verrill 1882). 



var. fusca n. n. 

 PI. 11 fig. lit. 



Habitat: 



Gullmarn, Bohuslän (Loven) 1 sp. (=1. cirrigera Phil, of Loven 1846). 



Idalia aspersa Alder & Hancock 1845 a . 

 Habitat: 



Väderöarna, Bohuslän, 6 fms, rocks (Goes) 2 sps. 



General distribution : 



Norway: Hammerfest (Friele & Grieg 1901). British and Irish Coasts (Jeff- 

 reys 1869). — France (Vayssiere 1901). 



