46 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA. 
9.4; wh. 6 (Fig. 8); Gullmarn (Lovén) many sps, different localities, max. h. 10.6; 
ap. 5.6; d. 10.9; wh. 6; Stigfjorden (Aurivillius) many sps, max. h. 9.4; d. 9; wh. 
d”/4, Fig. 9. — Sydkoster, 5—20 fms (Eisen & Stuxberg 1871) 5 sps, max. h. 8.1; 
d. 9; wh. 6; W. of Nordkoster, 10—15 fms, clay (Ljungman "/s 1865), 4 sps, max. 
h. 7.9; Dyngö (Goéäs) 2 sps. 
Norway: Dröbak, 5—6 fms, stones, alg&e, 8 sps, max. h. 9.2; d. 9.5; wh. 6. — 
Hitterö, 20—30 fms, shells (Öberg 1869), many sps, max. h. 11; ap. 5.3; d. 10.5; 
wh: 6 "a. — Jederen, 100 fms, 1 sh., h. 14; d. 13.5. — Stavanger (v. Friesen), 3 shs 
+1 sp, max. 9.6 (sh.); 8.6 (sp.). — Hardanger, 75 fms, sand (Bovallius) I sh: — 
Utnefjord, 95 fms (Bovallius) 1 sp., h. 3.6. — Flekkefjord, 15—20 fms (Öberg 1869) 
d sps, max. h. 8.4, Fig. 13. — Samlenfjord, 220 fms, rocks, 1 sp. + 1 sh., max. (sp.) 
h. 8.6; ap. 4.1; d. 9; wh. 6. — Storeggen (v. Yhlen), 50—140 fms, shingles, 1 sp., 
h. 8.6; d. 9; wh. 5”/s4, Fig. 10. — N. W. of Egersund, 50—60 fms (”/10 1872) 1 sh., 
h. 8.3. — Molde, Christiansund and Bergen (Lilljeborg) small sps (Mus. U.). — Fin- 
mark (Lovén) a few sps, max. h. 11.5; d. 11.3; D:o, Grötsund, 4—30 fms, clay (Goéös 
& Malmgren 1861), many sps, max. h. 12.5; ap. 5; d. 11.4; wh. 6 ”/., Fig. 14; Karlsö- 
sund, 15 fms, stones, corals (1861), many sps, max. h. 10; d. 9.4; wh. 6 !/2; Tromsö, 
20 fms (1861), 1 sp.; h. 7.6; Kjosen, 30 fms, clay (1861), many sps, max. h. 13.7; ap. 
6.3; d. 118; wh: 6/4; Fig: 12; Ulfsfjord (1861) many sps, max. ho I325rOf3s 
Kola Peninsula: Waidaguba (Sandeberg '!"/o 1877) 1 sp., h. 8.8; ap. 4; d. 
8.3; wh. 5. 
Iceland (ODHNER 1910); Reykiavik, 1 sp., h. 8. 
Limits of formal variation: 
Scandinavia ; Height of shell 4—5 | 6—7 | 8—9 10—11 | 12—13 | 13—14 | max. 14 (Jederen) | 
100 sps Height of Eraextono | 222 | 3.2—3.9 | 3.8—4.8 | 4.4—5.8 | 5—6.5 | 5.5—06.7 | 6.5 | 
| measured Diameter of shell 4.838—6.8 6.8—8.8 | 8—10 | 9.2—11 1|10.3—13 |11.2—13.5| 13.5 | 
| Wbhorls |4 !/2—5 | HANNE BN | 6-7 | 
In comparison with the preceding species the variation breadth is smaller and 
the difference in size between maximal specimens of Sweden and Norway is not so 
striking. Specimens from Finmark are usually more elevated than elsewhere. 
General Distribution: 
Norway: Vadsö and Vardö, southwards, 100 fms (d. 10, G. O. Sars 1878; Friele 
1874; Schneider, h. 11, 1885; 1881; 1891; 1894; Bidenkap 1897; Aurivillius 1886; 
Norman 1902). — Christianiafjord, 10—100 fms (Asbjörnsen 1854; Jeffreys 1870). — 
Bohuslän, 14—235 fms (Malm 1855); Göteborg Skärgård (Malm 1858); Hallands Väderö; 
Skelderviken (Lönnberg 1903); Kullen (Lilljeborg 1852"). — Kattegatt to 24 fms 
(Mörech 1871, Petersen 1888). — Öresund, to S. of Hven, 22—29 m. (h. 11; Lönnberg 
1898). — Iceland (Mörch 1869:; Verkrizen 1872). — Faroes (d. 10, Mörch 1868). — 
S. W. of Faroe Isles, 650 fms (Jeffreys 1883). — British Islands (Jeffreys 1865). — 
