46 N. ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. VI. PROSOBRANCHIA. 2 SEMIPROBOSCIDIFERA. 



villius 1886; Bfdenkap 1897); Finmark to Trondhjem, down to 150 fms (M' Andrew 1856); 

 Christiansund (Lilljeborg 1852*); Bergen (Friele 1874); Haugesund, 5 — 20 fms (Metz- 

 ger 1875). — Bohuslän (Loven 1846). — Hanstholm, Jutland, 36 fms (Metzger 1875). 

 — S. of Lilla Middelgrund to South Kattegatt, 10 — 20 fms; Samsö to Lille Belt and Strile; 

 Odense Fiord?; Fsenö Sound, dead; not in Limfjord (Mörch 1871; Petersen 1888). — 

 Dogger Bank, exceedingly rare; Scarborough (Hargreaves 1910). — British Islands, 

 east coast from Scarborough to Orkney Islands, 7 — 79 fms; Cork (Jeffreys 1867, Ni- 

 chols 1900); N. of Hebrides (Jeffreys 1869); N. and E. of Scotland; Shetland— Faroes, 

 49 — 150 m (Simpson 1910). — North Sea coast of Holland and Belgium, rare (Maitland 

 1897). — Faroe Islands (Mörch 1868). ^ Iceland (Mörch 1869^ Verkriizen 1872; Odhner 

 1910). — Jan Mayen, 15—30 m (Becher 1886). — Beeren Island, 15— 300 fms (Friele & 

 Grieg 1901). — Spitzbergen (Mörch 1869"); Norwegian Islands, 15 — 20 fms (Friele & 

 Grieg 1901). — Murman coast, White Sea, W. coast of N. Zembla, Kära Sea, Sea of Si- 

 beria (Herzenstein 1893; Leche 1878; Auri villius 1887); W. coast of N. Zembla, 33 m 

 (Knipowitsch 1901"). — Russian Lapland (h. 14.5; wh. 5); Behring Sea (h. 40; wh. 5 '/j; 

 Middendorff 1849). — West Greenland down to 100 fms (Posselt & Jensen 1899). — 

 Massachusetts Bay, Banks, Halifax, Marcouin (Gould & Binney 1870). — Off New- 

 foundland, 1267 m (Dautzenberg & Fischer 1912.) Deptlis down to 1267 m. Clay, 

 sand, stones. 



Acrybia flava (Gould 1840) 



= v Bulbus Smithii Brown 1838; = Natica ai^erta Loven 184:6. 

 Pl. 4, Figs. 26—28. 



Habitat: ^ 



Finmark (Loven), 1 sh., h. 12.8; ap. h. 11. c; br. 11.5; ap. br. 7.4; umb. 6; sut. 2.9; 

 wh. 4 (Lovén's type of Natica aperta). — Grötsund (Goés & Malmgren 1861), 1 sh., h. 

 12.5; ap. h. 11; br. II.ö; ap. br. 6.7; umb. 5.3; sut. 2.3; wh. 4 (Fig. 28). —Ulfsfjord, 25—50 

 fms (G. & M. 'Vio 1861), 1 sp., h. 8.7; ap. h. 7.6; br. 7.8; ap. br. 4.7; umb. 3.9; sut. I.3; 

 wh. 3 V4 (Fig. 27). — Karlsö, 30 fms, shells (Malmgren 1864), 1 sh., h. 5.2; ap. h. 4.9; br. 

 5; ap. br. 3.2; umb. 2.i; sut. 1; wh. 3. — Spitzbergen, Recherche Bay, betweenReindeer 

 Point and Fox Glacier, 90 m, stones with fine grayish-blue clay (7? 1898), 1 sh., h. 

 15.3; ap. h. 13.6; br. 14.3; ap. br. 8.5; umb. 6.5; sut. 2.9; wh. 4 (Fig. 26). 



Thanks to its depressed spira and shallow suture, its fine revolving strise, its wide 

 aperture with the reflected columellar margin and its general thinness, this shell re- 

 minds one forcibly of Lunatia tenuistriata Dautzenberg & Fischer, and thus the last- 

 named species has been described by Middendorff 1849 under the designation Natica 

 flava. Further it is doubtful, whether Brown's Bulbus Smithii is really identical with 

 N. flava; the figure as well as the description given by Brown (1844, pag. 184) make 

 it probable that his shell may be L. tenuistriata. In A. flava the columella forms a 

 strongly marked angle with the inner wall of the aperture, and the radula proves the 



^ Natica flava Gould iiicntioned by Leche 1878 froiii Kära Sea is Lunatia pallida, wliich confer. 



