KUNGL. SV. VET. AKADBMIBNS HANDLINGAR. BAND 48. N:0 1. 



29 



General Distribution: 



Aleutian Islands to S. Barbara Island, California (Dall 1878). 



Acmaea pelta Eschscholtz 1833. 



(= Patella testudinalis forma elatior Aurivillius 1887). 

 PI. 1 fig. 8. 



Habitat: 



Behring Island, together with the preceding species, numerous sps, max. 1. 

 42; br. 31.2; h. 16.8; apex. 14. 



Limits of formal variation (100 sps): 



1. 



16-18 



20—22 



24—26 



28—30 



32—34 



36—38 



br. 



11.2 — 13.4 



14—16.8 



16.8—21.4 



19.4—24 



22—27.6 



24.4—29 



h. 



5.4—7 



6.6—8.8 



7.8-11.4 



9—13.8 



11—15.8 



12.8—16.8 



apex 



4.2—6.4 



5.2—8 



6.4—10 



5.6—11.8 



8.6—13.6 



8.6—15.4 



General Distribution: 



Behring Island (Dall 1887). — »Aleutian Island and the southern coast of Alaska 

 south and east to the Santa Barbara Islands, Cal., between or near tide-mark* 

 (Dall 1878). 



Patella vulgata Linne 1758. 



PI. 1 figs. 24—26. 

 Habitat: 



Bohuslän: Hällö, 2 sps, max. 1. 53. — Gullmarn: Flatholmen, Blabergsholmen, 

 Bonden, Smögen, common in the outer islands, rocks, algse, in tide-mark (Theel 1907); 

 Off Bondhalet (Aurivillius 1895), — Väderöarna, many sps, max. 1. 47, highly varying 

 in form and sculpture (Figs. 25 — 26). — BohusLän, without definite locality, max. 1. 

 64 (v. Fries). 



Norway: Farsund, 15 fms, 2 shs, 1. 50 (Eugenie Exp. "/i. 1851); max. 1. 54 

 (Mus. U.). — jEederen, 100 — 150 fms, 1 sh., 1. 27.5 (B. Olsson). - Rondo, 20-30 



