KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 50. N:0 5. 35 



20 sps and shs, max. (sh. ) h, 30.5; ap. h. 22.3; br. 26.3; ap. br. 14.o; umb. IO.5; sut. 9.3; 

 wh. 6. 



Iceland (Odhner 1910; cfr also L. tenuistriata). Measurements: Arnanes, in fish- 

 stomachs, 1 sh., h. 13.5; ap. h. 10; br. 12; ap. br. 6.2; umb. 4.2; sut. 3.9; wh. 4 '/,, umbi- 

 Ucus wide (Fig. 30). — Berufjord, 9 — 40 fms, clay, many sps, max. h. 12.2; ap. h. IO.3; 

 br, 12.2; ap. br. 7; umb. 4,2; sut. 4; wh. 4 +; some shells with faint spiral striae, which are, 

 however, not so distinct as in L. tenuistriata; radula typical. — Hofsos, 40 fms, clay, 

 4 shs, max. h. 14.4; an other sh. h. 13.i; ap. h. 11. 2; br. 12; ap. br. 7; umb. 5.7; sut. 3.i; 

 wh. about 5. 



East Greenland (Hägg 1905; cfr L. tenuistriata): Mackenzie Bay, N. of Franz 

 JosephFiord, 3 — 10 m, mud, sand, Laminarise (Zool. Polar Exp. '% 1900), 1 sp., h. 12.5; 

 ap. h. 9.3; br, 11; ap. br. 6.4; umb, 4.2; sut. 3.2; wh. 4, shell yellowish white (Pl. 4, Fig. 8; 

 Pl. 5, Fig. 18); D:o, 12—35 m, mud ('-% 1900), 3 sps, together with Natica clausa, 

 max. h. 18.2; ap. h. 14; br. 16; ap. br. 9; umb. 6.7; sut. 5.2; wh. about 4; shell yellowish 

 white. — Musk Ox Fiord, outer part, Franz Joseph Fiord, 220 m, clay (^Yg 1900), 1 sp. 

 (placed by Hägg in N. clausa), h, 13.o; ap. h. 11; br. 11. 0; ap. br. 6.8; umb. 5; snt. 2.7; 

 wh. about 5; and 1 sh. (Hägg 1905, h. 18,7). 



West Greenland (Posselt & Jensen 1899).' Additions and measurements: Juliane- 

 haab, 6 sps, max, h, 17.5; ap. h. 13.2; br, 15; ap, br, 8,2; umb. 6.5; sut. 5.2; wh. 4 72- — 

 Fiskernaes, 1 sh., h, 20; ap, h. 14; br. 17,5; ap, br, 9; umb. 6.5; sut, 5.8; wh. about 5. — 

 N. W. Atlantic, 52° 25' N. 52° 12' W., 162 fms, loose clay with sand (Ing. & Glad. Exp. 

 'Vs 1871), 1 sh., broken, tliin, h. 19; ap. h. 15.8; br. I6.4; ap. br. 9.4; umb. 7.5; sut. 4.3; 

 wh. about 4. — Sukkertoppen, 4 sps, max. h. 15.2; ap. h. 12; br. 13.5; ap. br. 8; umb. 6; 

 sut, 4; wh, 5 (Fig. 15). — 68" 9' N. 56° 32' W., 48 fms, sand (Ing. & Glad. Exp. '% 1871), 



1 sh., h. 20; ap. h. 15.3; br. 17.7; ap. br. 10; umb. 6.8; sut. 6,1; wh. about 4; shell thin. — 

 Egedesminde, 4 shs, max. h. 10,7; ap. h. 8; br, 9.5; ap. br. 5.3; umb. 3.5; sut. 2.8; wh. 

 about 4. — Godhavn, 30 — 50 fms (Amondsen), 1 sh., h. 13; ap. h. 9.7; br. 11. 5; ap. br. 

 6; umb. 4; sut. 4; wh. about 4; D:o, 30 fms, clay, stones (Torell 1860), 2 shs, max. h. 

 8.7; ap. h. 7.2; br. 8.2; ap. br. 4.0; umb. 3; sut. 2; wh. about 4. — Claushavn, 20 fms, stones, 

 clay (Öberg Va 1870), 2 shs, max. h. 18.(1; ap. h. 14; br. 16.0; ap. br. 8.5; umb. 6; sut. 5.5; 

 wh. about 4 y.. — Umanak, 20 — 45 fms, rocks (Torell), 1 sp., and 1 sh., max. (sp.) h. 14.i; 

 ap. h. 11. o; br. 13.5; ap. br. 7.5; umb. 5; sut. 4; wh. about 4; D:o, 250 fms, clay (Torell), 



2 shs and 1 sp., max. (sh. ) h. 14.8; ap. h. 11. 5; br. 13.2; ap. br. 7.6; umb. 5; sut. 4.5; wh. 

 about 4; D:o, 150 — 200 fms, clay (Torell & Amondsen), 5 shs and sps, max. h. 14.7; 

 ap. h. 12; br. 13.4; ap. br. 7,4; umb, 5; sut, 4.8; wh. about 4. — Upernivik, 80 — 90 fms, 

 shells (Amondsen), 1 sp., h. 2.5; wh. 2 V.. — Proven, 16 — 40 fms (Torell), 1 sp., h. 13.3; 

 ap. h. 10.8; br. 11. 4; ap. br. 6.s; umb. 4.5; sut. 3.7; wh. about 4, shell thin. — Jacobshavn, 

 380 fms, clay with sand (Öberg % 1870), 3 sps, max. h. 3.8; wh. 3. — Ritenbenk, 30-40 

 fms, shells (Öberg -7» 1870), 3 sps, max. h. 9.3; ap. h. 7.8; br. 8.8; ap. br. 5; umb. 3.3; 

 sut. 2; Avh. 4. — Kekertak, Tossukatek, 140 fms, clay, stones (^V« 1870), 1 sp., h 8.9; 



^ Tlie specimens from Arsukfjord, 63° 35' N., Skinderlivaleu, Godhavn, Godtliaab and Upernivik, men- 

 tioued by Posselt & Jensen as occuriug in tlie Museum at Stockholm, are Natica clausa, which confer. 



