48 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. V. PROSOBRANCHIA. 1 DIOTOCARDIA . 



Hitterö, 20—30 fms, shells (Oberg 1869), 2 sps, max. h. 7.2 — Flekkefjord, 15—20 

 fms (Oberg 1869) 2 sps, max. h. 12.:»; ap. 4 4; d. 12.2. Samlenfjord, 220 fms, 

 rocks (Bovallius 1880) 3 sps + 1 sli., max. h. 12, r.; Utnefjord, 95 fms, sand (B. 1880), 

 6 sps + 8 shs, max. (sp.) h. 14. b; d. 14; wli. 7; Gravenfjord, 150 fms, shells (B. 

 1880), 3 shs, max. h. 13.5; d. 12.4, Fig. 17; Bergen (M. Sars) many sps, max. h. 

 13.5, Fig. 18. — Storeggen, E. Bredsimd, 20—100 fms, 1 sh., h. 9.5. — Christiansund 

 (Lilljeborg) many sps, max. h. 12. c (Mus. U.). — Trondhjem (Boeck) 1 sp. h. 11. r.. 

 — Finmark, Grötsund, 100 fms (1861) 2 sps + 1 sh,, max. (sp.) h. 11.5; ap. 3,5, d. 10. h; 

 wh. 8, Fig. 20. 



Limits of formal variation: 



Height of shell 



6-7 



9- 



10 



11—12 



13—14 



16—17 



max. 18 (Gulhiiarn) 



45 sps Height of aperture 



2.2—3 



3" 



3.8 



3.4—4.5 



4—5.1 



5—6.2 



0.5 



measured Diameter of shell 



5.8—7.7 



S.5-~ 



10.5 



9.8—12 



11.2 — 13.7 



13.7—15 



15 2 



Whorls 



6V-; 



VI:- 



8 



8-8'/-' 







10 



Sculptural variation: The basal or peripheric ridge is sometimes feeble or wholly 

 absent. 



Oeupial Distribution: 



Norway: Lofoten, southwards, 20—30 fms (h. 16; G. O. Sars 1878; Friele 1874; 

 Krause 1887; M' Andrew 1856; Metzger 1875). — Christianiaf jord, sand and stones, 

 10-100 fms (Asbjörnsen 1854; Jeffreys 1870). — Bohuslän, 20— 50 fms (Malm 1855); 

 Göteborg Skärgard (Malm 1858); Bohuslän to Bergen (Loven 1846). — Kattegatt 

 to S. 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 Ireland, 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 zizypliiiius Auct., non Linne 1758.) 

 PI. 3 tigs. 21—23. 



Habitat: 



West coast of Sweden: Gullmarn, several sps, different localities (Theel 1907); 

 max. h. 25.5; ap. 11; d. 26.8; wh. 9 \/2; h. 20.5; ap. 7; d. 21; wh. 9, Fig. 21. — 

 Väderöarna, many sps, max. h. 28; another sp. h. 27; ap. 11; d. 26.3; wh. 9. — 

 Kummelbanken, Skagerrack (1900) 2 sps, max. h. 16. 



