KUNGI.. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:o 1. 41 
marn (Lovén) several sps, max. 1. 13.8; br. 10.5; h. 9.6, Fig, 45. — Väderöarna, 60 
fms, clay (Gunh. Exp. '"/+ 1877) 4 shs, max. 1. 8; D:o (A. Goös 1861) many sps, 
max: darl6;,br. 12; B3 9; D:0;140—50-fms, corals, (Gunh. Exp. ?5/; 1877) 2 sps, max. 
]. 9.5. — Kosterfjorden, shells, alge (Malmgren) 2 sps, max. 1. 9; Koster, many shs, 
max. 1. 11.6; br. 10.2; h. 8; Sneholmen, Kosterfjorden, 60—120 fms (Aurivillius 1895) 
1 sp., 1. 6. — Ramsö, 10—55 fms, sand mixed with clay (Eisen & Stuxberg '?/; 
1871) 7 shs, max. 1. 11.2. — Svinesund, 30—70 fms, mud with stones (Lindahl) 3 
shsjmax. 1. 7.6. 
. Norway: Christianiafjorden (Asbjörnsen) 5 shs, max. 1. 13.7; br. 10; h. 8.5; 
another specimen, varr incurva (with concave inferior margin) 1. 6.3; br. 5.2; h. 5.6. 
— Dröbak 60 fms, clay (Lovén) many sps, max. 1. 13.1 and 7.3; Bug 5—6 fms (Lo- 
vén) 1 sp. juv. — Christiansand, 530 fms, shells (Lindahl) 1 sp., 1. 8. — Hitterö, 20— 
30 fms, shells (Öberg 1869), many sps, max. l. 10.6. — Rondö, 60 fms, clay (v. 
Nilen illispa 1; 104; br. 7.1; hh: 6. — Farsund, many shs, max. 1. 15.2; br. 12; h. 
5 (Mus. U.). — Utnefjord, Hardanger, 110 fms, sand (Bovallius 1880) 2 sps, max. 1. 
11.e. — Storeggen, 150 fms, Oculina ('/s» 1862) 1 sp., 1. 6 (Mus. G.) — Bergen, 3 shs, 
(Lilljeborg) max. 1. 7.5 (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 (Lovén) 2 shs, max. 1. 8.2; br. 6; h. 4.s, Fig. 43; the 
other sp., 1. 6.8; br. 4.9; 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): 
] 4—5 | 6—7 8—9 10—11 | 12—13 | max. 16 (Väderöarna) 
| 55 sps br. | 2.8—4 4—5.:5 | 57—1 7—=38:7 | 8:2—10:5| 12 
| measured hi | 218-38 | 3.2=5.7 | '37--6:2' | '4.6—-6.9" | 5.4— 8.4 |) 9 
| apex !| 0.5—1.3 | 0241 0!e—3!75| 2A3-=AR | FIEF 5.2 
This species varies greatly in form, from a depressed (var. subdepressa Jeffreys 
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. incurva 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, incl. var. incurva). — Bohuslän, 
to 80 fms (Malm 1855; Lovén 1846); Göteborg Skärgård (Malm 1858); Kullen (Lillje- 
borg 1852). — Kattegatt, Aalbek, 40 fms, dead shs (Mörch 1871); Hellebek, 14 fms, 1 sp. 
! Perpendicularly from posterior margin. 
KE. Sv. Vet. Akad. Handl. Band 48. N:0 1. 6 
