KUNGI.. SV. VET. AKADEMIENS IIANDLINGAR. BAND 48. N:0 1. 



41 



marn (Loven) several sps, max. 1. 13.«; br. lO.r. ; h. 9.6, Fig. 45. — Väderöarna, 60 

 fms, clay (Gimh. Exp. 'Vt 1877) 4 slis, max. 1. 8; D:o (A. Goes 1861) many sps, 

 max. 1. 16; br. 12; h. 9; D:o, 40—50 fms, corals (Guiih. Exp. ^^/v 1877) 2 sps, max. 



I. 9.6, — Kosterfjorden, shells, algse (Malmgren) 2 sps, max. 1. 9; Köster, many shs, 

 max. 1. 11.6; br. 10.2; h. 8; Sneholmen, Kosterfjorden, 60— 120 fms (Anrivillius 1895) 

 1 sp., 1. 6. — Ramsö, 10—55 fms, sand mixed with clay (Eisen & Stuxberg 

 1871) 7 shs, max. 1. 11.2. — Svinesnnd, 30 — 70 fms, mud with stones (Lindahl) 3 

 shs, max. 1. 7.6. 



Norway: Christianiafjorden (Asbjörnsen) 5 shs, max. 1. 13.: ; br. 10; h. 8.r>; 

 another specimen, var. incur va (with concave inferior margin) 1. 6.s; br. 5.2; h. 5.i;. 

 — Dröbak 60 fms, clay (Loven) many sps, max. 1. 13. i and 7.;i; D:o, 5 — 6 fms (Lo- 

 ven) 1 sp. juv. — Christiansand, 50 fms, shells (Lindahl) 1 .sp., 1. 8. — Hitterö, 20— 

 30 fms, shells (Oberg 1869), many sps, max. 1. 10. o. — Rondo, 60 fms, clay (v. 

 Yhlen) 1 sp., 1. 10.4; br. 7.i; h. 6. — Farsund, many shs, max. 1. 15.2; br. 12; h. 

 8.5 (Mus. U.). — Utnefjord, Hardanger, 110 fms, sand (Bovallius 1880) 2 sps, max. 1. 



II. 6. — Storeggen, 150 fms, Oculina (V» 1862) 1 sp., 1. 6 (Mus. G.) — Bergen, 3 shs, 

 (Lilljeborg) max. 1. 7.ö (Mus. U.); D:o (M. Sars) many shs, max. 1. 13.7, Fig. 44; 

 D:o, 100—160 fms (Johansson 1877) 1 sp., 1. 8.9. — Grip (Lilljeborg) 2 shs, max. 1. 

 8.2 (Mus. U.). — Finmark (Loven) 2 shs, max. 1. 8.2; br. 6; h. 4.5, Fig. 43; the 

 other sp., 1. 6.«; br. 4.o; h. 4.4, Fig. 32. — Grötsund (1861) 1 sh., 1. 8; br. 6.3; h. 3.8. 



? Spitzbergen: Bel Sound, 35—40 fms, stones with Zoophytes (Torell) 1 sh., 

 1. 9.6; br. 7.3; h. 5.8. Locality probably mistaken. 



Limits of formal variation (Scandinavian coasts): 



1. 



4—5 



6-7 



8-9 



10-11 



12—13 



max. 16 (Väderöii.rna) 



55 sps lir. 



2.8—4 



4—5.5 



5.7—7 



7—8.7 



8.2—10.5 



12 



measured li. 



2.3—3.8 



3.2—5.7 



3 7—6.2 



4.6—6.9 



5.4—8.4 



9 



apex ^ 



0.5—1.3 



0—2.1 



0.e>— 3.7 



2.3—4.5 



3-5.2 



5.2 



This species varies greatly in form, from a depressed (var. subdepressa Jeiirejs 

 1865) to a much elevated (var. elata Jeffreys 1865) shape. The position of the apex 

 is usually dependent upon height, so that in higher specimens it is very near to and 

 sometimes almost vertically bent over the posterior margin (var. mcwrm Jeffreys 1865). 



General Distribution: 



Norway: Hammerfest, southwards, to 100 fms (1. 14, G. O. Sars 1878; Krause 

 1887; Friele 1874; Metzger 1875; Lilljeborg 1851; Nordgaard 1907). — Christiania- 

 fjord, 20—60 fms (Asbjörnsen 1854; Jeffreys 1870, inch var. incurva). — Bohuslän, 

 to 80 fms (Malm 1855; Loven 1846); Göteborg Skärgard (Malm 1858); Kullen (Lillje- 

 borg 1852). — Kattegatt, Aalbsek, 40 fms, dead shs (Mörch 1871); Hellebsek, 14 fms, 1 sp. 



^ Perpeiidicular'ly from posterior margin. 

 K. Sv. Vet. Akad. Haiidl. Band 48. N:o 1. 



