54 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 



General Distribution: 



Norway, Finmark southwards (d. 7; G. O. Sars 1878; Friele 1874; Schneider 

 1881; 1885; 1891; 1894; Bidenkap 1897; Aurivillius 1886; Norman 1902) ; Korsfjord 

 135 — 217 fms (Metzger 1875). — Bohuslän, Väderöarna, Laminarise (Malm 1855); 

 Göteborg Skärgärd, Vinga ränna, 1 sp. (Malm 1858). — Kattegatt, NE. of Anholt, 

 dead shs (Petersen 1888). — Iceland (Mörch 1869% Verkrüzen 1872; Johansen 1902). 

 — Faroes (Mörch 1868). — British Islands (Jeffreys 1865, Hargreaves 1910, + var. 

 fasciata). — Jan Mayen, 10 — 15 fms (Friele 1878, Hägg 1905). — Norwegian Sea 

 (Friele 1902). — Murman Coast, White Sea, Nova Zembla and Kara Sea (Herzenstein 

 1893, Dautzenberg 1911). — Russian Lapland (Middendorff 1849). — Kara Sea, 2—20 fms 

 (Leche 1878; Collin 1887). — Franz- Josef Land, 1—127 fms (Melvill & Standen 1900). — 

 Spitzbergen, to 87 m (d. 8.5, Knipowitsch 190P; 1902; Krause 1892; Friele 1879; Mörch 

 1869). — Greenland, to 100 fms (Posselt & Jensen 1899). — Jones Sound, 4—26 m, max. d. 

 9.2 (Grieg 1909). — Parry Islands (Sutherland 1852). — Eastern Canada (Whiteaves 

 1901). - New England (d. 6, Gould & Binney 1870). - Behring Sea (Crosse 1877; 

 Krause 1887); Behring Island (Dali 1885); Aleutian and Sitcha (Dali 1875). — Ochot- 

 chian Sea (var. major, Middendorff 1849, 1851). — Amur, 1. 5.5 (Schrenk 1867). — 

 Northern Japanese Sea (Dunker 1882). — Vancouver Island (Carpenter 1864). Depths 

 to 226 m; Young sps to 386 m; dead shells to 1,203 m (Hägg 1905). Algae, stones, 

 sand, clay. 



Margarita olivacea (Brown 1827) 

 (inch var. gigantea Leche). 



PI. 3 figs. 41—46; PI. 4 figs. 1—3; PI. 6 figs. 8—13. 

 Habitat: 



Finmark (Loven) 1 sp., h. 2.6; d. 3.o; sculpture moderately fine; colour light 

 yellowish green. — D:o (Sparre Schneider) 3 sps, max. h. 3.6; ap. 2.2; d. 4; wh. 

 4 \l2 ; aperture somewhat lower than in specimens from Spitzbergen. 



Kara Sea (Leche 1878), max. h. 5.(i; ap. 3.6; d. 6.2; wh. 472; sculpture varying, 

 coarser or finer. Var. gigantea; h. 9.7; ap. 6.5; d. lO.o; wh. 5, Fig. 3 to the right; 

 h. 10.3; ap. 7; d. 11. 2; wh. 572, Fig. 3 to the left. — Further: Jugor sharr, off 

 Chabarova, 5—8 fms, clay, sand (N. Zembla Exp. ^7^ 1875). 



North of Siberia and Behring Sea (Aurivillius 1887): Irkaipij, Fig. 2, and 

 other localities. Max. dimensions of var. gigantea (= the type of Aurivillius), N:o 

 1068: h. 6.2; ap. 4.2; d. 7; wh. 4 and h. 6; ap. 4.5; d. 7.6; wh. 4. Shell thin, light 

 coloured; apex obtuse. 



Spitzbergen: Off Horn Sound, 76° 46' N., 5° 22' E., 210 m, fine blackish gray clay, 

 bottom temp. + 2.83° ("Ve 1898), 12 sps, max. h. 8; ap. 5.4; d. 9 (agreeing with var. 

 gigantea by the thin shell and the pointed apex, but aberrant by the more elevated 



