KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 5. 45 



— Norwegian Islands, 15 — 20 fms, stones, sand ('Vs 1872), 1 sp., h. 4.3; ap. h. 3.3; br. 

 3.g; ap. br. 2; umb. l.i; sut. 1. — Mossel Bay, 9 V2 — 14 fms, Lithothamnium, sand (7io 

 1872—^72 1873), 3 sps and 3 shs, max. sh. li. 32.2; ap. h. 22.2; br. 25; ap. br. 14; umb. 

 11; sut. 8.6; wli. 6 V2, apex eroded (Fig. 30); max. sp. h. 16.8; ap. h. 12.2; br. 13.3; ap. br. 

 7.2; umb. 5.6; sut. 4; wh. about 5. — Treurenburg Bay, 10 — 15 fms, clay Avith stones 

 (1861), 1 fragment, li. 13. — Castrén's Islands, 30 — 40 fms, clay, stones (Vo 1868), 1 sh., 

 h. 15.2; ap. h. lO.s; br. 12; ap. br. 6.8; umb. 4.2; sut. 4.2; wh. about 5. — Parry's Island, 

 25 — 30 fms, gravel, stones (Vg 1868), 2 sps, max. h. 15; ap. h. 12.3; br. 12.8; ap. br. 8,5 

 (mouth waU broken). 



Beeren Island (July 1868), 1 sh., h. 6.5; ap. h. 4.?; br. 5; ap. br. 3; umb. l.o; sut. 

 1.8; wh. 4 Vi- — Beeren Island Bank, 25 fms ('Vio 1868), 1 sp., h. 8.4; ap. h. 5.8; br. 

 6.4; ap. br. 3.6; umb. 2.8; sut. 2.i; wh. 4 '/j. 



Iceland (Odhner 1910): Berufjord, 40 fms, sand with shells (Torell), 7 shs, max. 

 h. 11; ap. h. 7.7; br. 8.5; ap. br. 5; umb. 3.2; sut. 3.i; wh. 5; D:o, 15 — 30 fms, rocks, 1 

 sh., h. about 6. 



West Greenland (Posselt & Jensen 1899); without definite locality, 1 sh. (Möller's 

 orighial), h. 9; ap. h. 6.7; br. 7; ap. br. 4.i; umb. 2.9; sut. 2.2; wh. 4 V3 (Fig. 35). — Godt- 

 haab, 100 fms, 1 sh., h. 8.2; ap. h. 6.3; br. 6.5; ap. br. 3.8; umb. 2.6; sut. 2; wh. 4 Yj. — 

 Da vis Strait, 68° N. 54° 30' W., 20 fms, fine sand (^7^ 1870), 2 sps, max. h. 6.5; ap. h. 

 5.3; br. 5.5; ap. br. 3; umb. 2.3; sut. I.4; wh. 4; D:o, 65° 11'. 8 N. 53° 33'. 8 W., 48 fms, green- 

 ish clay ("„ 1871), 2 shs, max. h. 5.8; ap. h. 4.i; br. 4.3; ap. br. 2.7; umb. I.7; sut. I.4; 

 wh. about 4; D:o, 63° 35' N. 52° 57'.6. W., 43 fms, sand, shells (7b 1871), 3 fragmentary 

 shs, max. h. 10. 5; ap. h. 8.2. 



yariatiou of tlie Shell. 



The shell varies somewhat, even in the same locality, both as regards its proportions 

 (longer or shorter aperture, higher or more depressed spire) and its sculptm^e (more or 

 less conspicuous spiral blunt ridges, sometimes minute strise). The umbilicus is closed 

 or fissure-like. The colour is greenish, grayish or brownish (lighter in southern forms) 

 and the cuticula is always fibrous Avdth a silk}^ gleam. The lip insertion is always 

 angular (seen from spire). Arctic specimens are but little larger than southern shells of 

 the same whorls, e. g. a sh. of 5 V, whorls from Mossel Bay is 17 mm in height, 13.7 mm 

 in breadth, and a sh. of 5 V2 whorls from Bergen is 16 mm in height, 12.3 mminbreadth. 

 The (fossil?) shells from Öresund and Trondhjemsfjord are, however, decidedly higher 

 (cfr Lunatia pallida). 



(xeiieral Distribution. 



Norway: Vadsö to Avest coast, 10 — 50 fms (h. 25, G. O. Särs 1878); Vadsö (Verkrii- 

 zen 1875); Vardö, in the stomachs of Gadus seglefinus (Sparre Schneider 1894); E. 

 Finmark (Norman 1902); Varangerfjord, 23 m (De Guerne 1886); Malangenfjord (h. 30, 

 dead, Sparre Schneider 1891); N. Norway (Krause 1887; Sparre Schneider 1885; Auri- 



