26 N. ODHNER, NORTHERN AND ARCTIC INVERTRBRATES. VI. PROSOBRANCHIA. 2 SEMirROBOSCIDIFERA. 



sand, shells (Lindahl), 7 shs and sps, max. h. 4; D:o, 192 fms, 4 shs, verv small, li. about 

 2 mm. 



Norway: Christianiafjord (Asbjörnsen), 1 sh,, h. 13,4; ap. h. lO.s; br. 11. g; ap. br. 

 6.2; umb. 5; sut. 3.2; wh. 5 V2- — Dröbak (Loven 1850), 1 sh., h. I8.3; ap. li. 14.c; br. 

 15.g; ap. br. 8.7; umb. 7. c; sut. 4.5; wh. 7; D:o, 5 — 6 fms, stones, algse, 3 shs, max. h. 12. 

 — Hitterö, 20 — 30 fms (Öberg), 10 sps, max. h. 8. — Godo, 90 fms, clay (v. Yhlen), 

 2 shs, max. h. 7.2. — N. W. of Egersund, 100 fms (Uddström 1873), 1 sh., h. 4.7. — Bo- 

 dybet, 50 — 100 fms, gravel, stones (v. Yhlen), 5 sps, max. h. IO.4; ap. h. 8.0; br. 9.g; 

 ap. br. 5; umb. 4.i; sut. 2.3; wh. 5 +. — Farsund, many small shs (Mus. U. ). — Hauge- 

 sund, 25 fms, sand (Bovallius 1880), 4 shs, max. h. 11.5 (Mus. U. ). — Stavanger (v. Frie- 

 sen), 1 sp., h. 8.4. — Hardanger, 130 fms, rocks (Bovallius 1880), 1 sh., h. 11; D:o, Utne- 

 fjord, 90 fms, stones (Bovallius 1880), 8 shs, max. h. 6.8; D:o, 50 fms, clay (BovaUius 

 1880), many shs, max. h. 9; ap. h. 6.9; br. 8; ap. br. 4.i; umb. 3; sut, 2.3; wh. 5. — Bergen 

 (Särs), 12 sps, max. h, 14.5; ap. h. 12; br. 13, g; ap, br, 7.3; umb. 6.4; sut. 3. g; wh. 6. — 

 Christiansund and Molde, many sps, max. h. IO.2; and Grip, Romsdals amt, max. h. 12.4 

 (LiLLJEBORG 1852", Mus. U.). — Bejan, Trondhjemsfjord (Boeck), 1 sh., h. 11. 9; ap. h. 

 9.8; br, ll,i; ap, br, 5.7; umb. 5; sut. 2.8; wh. 5 +. — Karlsö Sound, 15 fms, stones, co- 

 rals (Malmgren 1861), 1 sh., h. 7.4; ap. h. 6.3; br. 6.8; ap. br. 3.g; umb. 2.9; sut. l.o; wh. 5. 



North Sea: 55° 13' N. 3° 45' 5" E., 30 fms (Eugenie Exp. =7,0 1851), 4 shs with 

 Brjrozoa, max. h. about 19. — 53° 40' N. 2° 37' E. (Eugenie Exp. ^'^Ao 1851), 1 sp., h. 

 17; ap. h. 13.7; br. 14.9; ap. br. 7.9; umb. 7.5 ; sut. 4,3; wh, 6, — Heligoland (J, Grill 

 Sept. 1855), 1 sp,, h, 14,5; ap, h, 11,3; br, 13.2; ap. br. 6.g; umb. 6; sut. 4; wh. 6. 



Limits of Formål Variation. 







Coasts of Scandinavia, 100 sps measured: 





11. of shell 



4—5 



G-7 



8—9 



10—11 



12—13 



14—15 



max. 18.3 (Dröbak) 



h. of aperture 



3.4—4.4 



4 8— G.2 



G— 8 



7.7—9 7 



9-11 



10.4—12.5 



14.6 



br. of shell 



3.6—4.9 



5.1—6.6 



0.6—8.6 



8.5—10.6 



10 2— 12.4 



11.7— about 14 



15.6 



br. of aperture 



1.9—2.6 



2.7—3.7 



3 5—4.8 



4.3—5.7 



5.1— G. 5 



5.7—7.6 



8.7 



lip to iinibilicus 



1.6—2.5 



2.2—3.5 



2.7—4.5 



3.2—5.3 



3.9—6 



4. ,5—6,7 



7.6 



lip to siitiire 



0.2— 13 



0.8—2 



1—2.7 



1.5—3.2 



2.2-3.8 



2.9—4.3 



4.5 , 



whorls 



4 



47,-5 



5 



> 5 



5>/,-6 



6—6'/., 



7 1 



General Distribution: 



Norway, from Lofoten (h. 13) southwards, 5—80 fms (G. O. Särs 1878); East Fin- 

 mark (Norman 1902); Bodö (Sparre Schneider 1886); Nordland, Finmark (M' Andrew 

 1856, Krause 1887); Christiansund (Lilljeborg 1852*); Bergen, 1—100 fms (Friele 1874); 

 west coast (Metzger 1875; Grieg 1912); Christianiafjord, 15 — 100 fms (Asbjörnsen 1854, 

 Jeffreys 1876). — Boliuslän, 7 -80 fms, and Göteborg Skärgård (Malm 1855, Trybom 1881, 

 Théel 1907). — Kullen (Lilljeborg 1855). — Skagen to E. Kattegatt and to Hellebsek, 

 Hjelm; Samsö, dead shs; not in Limfjord; 5 — 40 fms (Mörch 1871, Petersen 1888, Lönn- 

 berg 1903); W. coast of Jutland (Christensen 1907). — Heligoland, 10—29 fms; Dogger 



