KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:o 1. 29 
General Distribution: 
Aleutian Islands to S. Barbara Island, California (DALL 1878). 
Acmeea pelta EscHscHoLTtz 1833. 
(= Patella testudinalis forma elatior Aurivillius 1887). 
PINS So: 
Habitat: 
Behring Island, together with the preceding species, numerous sps, max. I. 
£2smpr. Sl.2; bh. 16.3; apex. 14. 
Limits of formal variation (100 sps): 
| 1. | 16—18, | 20-92. |"24—96 | 928-30 
32—34 36—38 
br. — |I1L2—13.4| 14—16.8 16.8—21.4 19.424 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 
l 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 LInnÉ 1758. 
Pl. 1 figs. 24—26. 
Habitat: 
Bohuslän: Hållö, 2 sps, max. 1. 53. — Gullmarn: Flatholmen, Blåbergsholmen, 
Bonden, Smögen, common in the outer islands, rocks, alg&e, in tide-mark (THÉEL 1907); 
Off Bondhålet (Aurivillius 1895). — Väderöarna, many sps, max. 1. 47, highly varying 
in form and sculpture (Figs. 25—26). — Bohuslän, without definite locality, max. I. 
64 (v. Fries). 
Norway: Farsund, 15 fms, 2 shs, 1. 50 (Eugenie Exp. !"/1. 1851); max. 1. 54 
(Mus. U.). — J&ederen, 100—150 fms, 1 sh., 1. 27.5 (B. Olsson). — Rondö, 20—30 
