KUNGL. SV. VET. AKADEMIENS HANDLINGAR, BAND 50- N:0 5. 13 



Geographical and Bathymetrical Distribution and General Observations. 



lan. = animal; ap. = aperture; br. = breadth; col. = columella; fms = fathoms : h. =height; 



[. =length; sh.(s). = shell(s); sp.(s). = living specimens; Mus. G. = Museum at Gothen- 



burg; Mus. L. = Museum at Lund; Mus. U. = Museum at Uppsala.] 



Trivia arctica [(Solander) Humphrey 1797] 



= Cyprsea curopsea Montagu 1808. 

 Pl. 4, Figs. 36—40. 



Habitat: 



Bohuslän, without definite locality (B. Fries 1838), 4 shs, max. 1. 9.9; br. 7.5; h. 

 6.3 (strongly ribbed) and 1. lO.s; br. 8.4; h. 6.7 (smootli, feeble ribs on the sides) — Gull- 

 marn, numerous sps and many localities (Thbel 1907): Flatholmsrännan (Loven), 

 3 sps. max. 1. 11; br. 8.i; h. 6.6; D:o (Aurivillius Vb 1890), 5 sps, max. 1. 10.?; br. 8.4; 

 h. 6.9, and one young, smooth sp., 1. 7; Smedjan, 15 fms, shells (N. Odhner Ve 1906), 3 

 sps, max. 1. 10.9; br. 8.1; li. 6.5; D:o (Aurivillius =7b 1890), 1 sp., 1. 10 (smooth); Fittebojen, 

 10 fms, shells (N. Odhner '/, 1907), 1 sp., 1. II.2; br. 8.5; h. 7; Gåsö (Mus. G.); Gullmarn, 

 without definite localities (Zool. St.) -vv-ith strong or feeble ribs (Figs. 38, 39), max. 1. 

 12.9; br. 10.2; h. 8.3 (Aurivillius, winter 1895; Fig. 36); Färlefjord (AurivilHus 7, 1890), 4 sps, 

 max. 1. 10.1; br. 7.9; h. 6.4 (strong ribs; spire concealed); 1. 8.3; br. 6.7; h. 5.4 (feeble ribs; 

 spire freely projecting); the remaining sps ha ve rather strong ribs but translucent spire. 

 — Väderöarna, sand, clay (v. Goés), 11 shs and sps, max. 1. 11. 2; br. 8.3; h. 6.9; D:o (Auri- 

 villius 1882), 5 sps, max. 1. 12; br. 9.2; h. 7.7; D:o, Lophohelia reef (Aug. 1889), 8 sps, 

 max. 1. 9.9; br. 7.2; h. 5.8 (feeble ribs, spire translucent); D:o, d:o (July 1890), 1 sp., 1. 9; 

 br. 7.3; h. 5.8 (smooth); St. Väderö, 10 fms (Olsson -'7,; 1869), 1 sh., 1. 8.8 — Kosterfjorden 

 (Aug. 1889), 2 sps, max. 1. 11. 3; br. 8.6; h. 7.2; Sydkoster (Aug. 1887), 1 sp., 1. 11.6; br. 8.9; 

 h. 7.3 (strong ribs; Fig. 37). 



Norway: Hitterö (Öberg 1869), 6 sps, max. 1. 11; br. 8.6; h. 6.9 (strong ribs). — 

 Bodybet, 70 — 100 fms, gravel (v. Yhlen), 1 sh., 1. 9.6; br. 7.3; h. 5.8 (strong ribs). — 

 Bergen (M. Särs), 7 sps, max. 1. 11. 2; br. 8.8; h. 7 (nearly wholly smooth; spire freely pro- 

 jecting; Fig. 40), andl. 11.2;br. 8.3; h. 6.9 (strongly ribbed). — Grip, Romsdals amt (Lillje- 

 BORG 1852^), 3 shs, max. 1. 11; br. 8.5; h. 7.2 (Mus. U.). —Trondhjem (Beck), 2 shs, and 

 1 sp., max. 1. (sh.) 11. 5; br. 8.6; h. 6.9; sp. 1. 9.i; br. 6.9; h. 5.7 (all strongly ribbed). 



