48 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
Hitterö, 20—30 fms, shells (Öberg 1869), 2 sps, max. h. 7.2 — Flekkefjord, 15—20 
fms (Öberg 1869) 2 sps, max. h. 12.9; ap. 44; d. 12.2. — Samlenfjord, 220 fms, 
rocks (Bovallius 1880) 3 sps + 1 sh., max. h. 12.5; Utnefjord, 95 fms, sand (B. 1880), 
6 sps+8 shs, max. (sp.) h. 14.3; d. 14; wh. 7; Gravenfjord, 150 fms, shells (B. > 
1880), 3 shs, max. h, 13.5; d. 12:44, Fig. 17; Bergen (M. Sars) many spe smax. mn. 
13.5, Fig. 18. — Storeggen, E. Bredsund, 20—100 fms, 1 sh., h. 9.5. — Christiansund 
(Lilljeborg) many sps, max. h. 12.6 (Mus. U.). — Trondhjem (Boeck) 1 sp. h. 11.5. 
— Finmark, Grötsund, 100 fms (1861) 2 sps + 1 sh., max. (sp.) h. 11.5; ap. 3.5, d. 10.s; 
wh. 8, Fig. 20. 
Limits of formal variation: 
Height of shell | 6—7 
=== - — — ——: 
9 LON II | T3=74 | 16-17 | max. 18 (Gullmarn) 
I 
| | 
| 45 sps Height of aperture | 2.2—3 | 3—3.8 | 3.4—4.5 | 4—5.1 5—6.2 | 6.5 
measured Diameter of shell | 5.83—7.7 | 8.5—10.5| 9.83—12 [ka 13.7—15 15.2 
Whorls | — 6!/2 T7'/[2—8 | 8—-8J/21 — 8/2 9'/f2 | 10 
Sculptural variation: The basal or peripheric ridge is sometimes feeble or wholly 
absent. 
General Distribution: 
Norway: Lofoten, southwards, 20—30 fms (h. 16; G. O. Sars 1878; Friele 1874; 
Krause 1887; M Andrew 1856; Metzger 1875). — Christianiafjord, sand and stones, 
10—100 fms (Asbjörnsen 1854; Jeffreys 1870). — Bohuslän, 20—50 fms (Malm 1855); 
Göteborg Skärgård (Malm 1858); Bohuslän to Bergen (Lovén 1846). — Kattegatt 
to 8. of Anholt (Petersen 1888). — N. Öresund, 29 m (h. 15; Lönnberg 1898). — 
S. and. S. W. of Faroe Isles, 159—364 fms (Jeffreys 1883). — N. of Hebrides, 189 
fms (Jeffreys 1869). — British Islands (Jeffreys 1865). — W. off Treland, 90—370 fms 
(Jeffreys 1883). — N. Bay of Biscay, 75 fms, dead shells (Reynell 1909). — France 
to 400 m (Locard 1899). — Belgium, rare (Maitland 1897). — Off Portugal and 
Morocco, 292—386 fms (Jeffreys 1883, Nobre 1905). — Cape Verde Islands (Jeffreys 
1883). Depts 15—386 fms. Rocks, sand, shells, clay. 
Calliostoma conuloide (LAMARCK 1822). 
(= Trochus zizyphinus Auct., non LIinnÉ 1758.) 
Pl; 3 fgs. 21-23. 
Habitat: 
West coast of Sweden: Gullmarn, several sps, different localities (THÉEL 1907); 
max. h..25:5xy ap. II; d..26.85 whi 91a; hjt20:56apd$) d205; mwist9, Henkel 
Väderöarna, many ' sps, max. h.:285; another sp. hh 27; ap, Il; d:i;26:8;whi 9. — 
Kummelbanken, Skagerrack (1900) 2 sps, max. h. 16. 
