KÜNGL. SV. VET. AKADEMIENS HAKDLINGAR. BAND 48. N:0 1. 



39 



80° N., 13° 30' E., 20 fms (\« 1861), 2 sps, max. 1. 4.o. — Lovens Monnt, 36 fms, 

 clay, stones ("/o 1868), 3 shs, max. 1. 7.5. — Waygat Islands, 60--70 fms, clay ^ 8 

 1861) 4 sps, max. 1. 9.4. — Hinlopen Strait, 10—25 fms, stones, clay (1861), 1 sp., 

 1. 7.5. - Thuym Point, 36 fms, rocks (" t 1873), 1 sp., 1. 4.i. - 72° 10' N., 20° 37' 

 E., 200—230 fms, clay (^'/t 1868), 2 shs, max. 1. 7.6. 71° 5' N. 20°, E., 125 fms, 

 gravel mixed with clay C^h 1868), 2 shs, max. 1. 6.4. 



Iceland (Odhnbr 1910); maximal measurements: Berufjord, 1. 6.7; br. 4.«; h. 4, 

 Fig. 32. - Thistilfjord, 1. 7.:^; br. 5.5; h. 4.5. 



East Greenland (HIgg 1905), 300 m, 1. 11 (Mus. U.). 



West Greenland (Posselt & Jensen 1898); maximal measurements: Proven, 1. 

 8.4; br. 6.3; h. 5.2, Fig. 41. — Sukkertoppen, 1. 8.4; br. 6.;!; h. 5.2. — Godthaab, 1. 

 8; br. 5.5; h. 5. — Omenak, 1. 9; br. 6.5; h. 5, Fig. 40. — Ikamiut, 1. 9; br. 6.4; 

 h. 5.2, Fig. 36. 



Bank of Newfoundland, 45° 53' N., 51° 56' W., 50 fms, shingles, shells (Ing. & 

 Glad. Exp. 1871), 2 sps, max. 1. 7; br. 5; h. 4.8. 



Limits of formal variation: 



Scandinavia. 



1. 



4-5 



6—7 



7—8 



8—9 



10—11 



13—14 



max. 15 (Skilrj 



S. and W. coast; 



br. 



2.5—3.9 



4.2—5.3 



4.7—6 



5.3—6.8 



7—8.5 



9.1-10.7 



11.2 



60 shs 



h. 



2.2—3.7 



2.8—5.1 



3—6 



3.4—6 



4.4—6.2 



5.1—7.1 



7.5 



measured apex ^ 



0.8—1,7 



1.5—3.3 



2—3.5 



2.3—3.9 



4—5.2 



5.6—7 



7 





1. 



4—5 



6—7 



8—9 



max 9.2 



(Grötsund) 



Finmark ; 



br. 



2.5—3.8 



4—5.7 



5.7—6.3 



6.3 







50 shs 



li. 



2,3-3.4 



3.2—5 



5.2—6.6 



6.5 







measured 



apex 



0.5—1.4 



1.1—2.4 



2—3.2 



3.2 









1. 



4—5 



6—7 



8—9 



10—11 



max. 11 (Spitzberg 



en without loc.) 



Spitzbergen; 



br. 



2.6-4 



4.3—5.3 



5.2-7 



6.8—8.7 



8.7 



45 shs 



h. 



2.2—3.5 



3.3—4.6 



4.7—6.9 



6.6—8 



8 





measured 



apex 



0.8—1.6 



1.3—2.5 



1.7—3.7 



3-5 



5 







1. 



3—4 



4—5 



6—7 



max. 7.3 (Thistilfjord) 



Iceland ; 



br. 



2—3 



2.8—3.9 



4.3—5,3 



5.5 







25 shs 



h. 



1.8—2.5 



2—3.3 



3.8—4.5 



4.5 







measured 



apex 



0.5—1.1 



0.6—1.3 



1.5—2.5 



3 









1. 



4—5 



6-7 



8—9 



max. 9 (Omenak) 





West Greenland; 



br. 



2.8—3-8 



4—5.3 



5.5—6.5 



6.5 







30 shs 



h. 



2-3.5 



3.4—4.8 



4.5—6 



5 







measured 



apex 



0.7--1.2 



1—2.2 



1.7—3 



2.8 







The variation of this species on the coast of southern Scandinavia is consider- 

 ably different from that of Arctic districts. The height is comparatively speaking 

 lower than elsewhere; this fact is obvious from the curves on pag. 7. In younger 

 specimens this character is less strikingly developed than in older ones. A comparison 

 between the larger specimens of Spitzbergen and those of Scandinavia proves that 



' Perpendicularly from po.sterior margin. 



