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



Geographical and bathymetpieal distribution. • 



[ap. =lieiglit of aperture; br. = breadth; d. = diameter; li. =heigtli; 1. =lengtli; sli(s).= 

 slieli(s); sp(s). = living specimens; Mus. G. = Museum at Gotlienburg ; Mus. L.= Mu- 

 seum at Lund; Mus. U.=-- Museum at Uppsala]. 



Acmsea testudinalis (Müller 1776). 



PI. 1 ügs. 1 — 7; PL 6 fig. I. 

 Habitat:! 



West coast of Sweden: Hittarp, Heisingborg, Slväue, 2 sps, max. 1. 8.f> (Lönnberg 

 1902); Kullen (Lilljeborg 1852^) 1 sli., 1. 15.5; br. 11.6; h. 5.2; apex 4 (Mus. U.) 

 — Kattegatt: Lilla Middelgrund, 10 fms, sand, stones, 2 sps, max. 1, 9.5 (Gunhild Exp. 

 'Vt 1878) — Boliuslcän: Marstrandsf jorden, 10 fms, 1 sp., 1. 11 (Sept. 1864); Gull- 

 marn, 1 sp., 1. 18 (Loven); D:o 4 sps, max. 1. 20.5; br. 15.3; h. 6; and 1. 18.5; br. 

 15.3; h. 7.6 (Mus. U.); D:o, Strömmarna, 10 fms, stones, 1 sp., 1. 10.4 (N. Odhner ^Vc 

 1907); D:o, Smalsund, Zostera, and Blabergsholmen, algae (Theel 1907); Väderöarna, 

 the coral reef, 1 sp., 1. 8.8 (Zool. St. 1890); Sydkoster, 15 — 20 fms, rocks, 3 sps, 

 max. 1. 21.5 (Eisen & Stuxberg '^/i 1871); Strömstadsfjärden, 1 sp., 1. 15.6 (Hanson 

 78 1 881); Svinesund, 30 — 70 fms, stony mud, 1 sp., 1. 7.2 (Lindahl 1871.) — Bohuslän 

 without definite locality, many sps, max. 1. 22 (Loven & B. Fries; PL 1 fig. 1); 

 1 sp. of aberrant breadth: 1. 18; br. 16, h. 6. 



Soutli and West coast of Norway: Dröbak, 5 — 8 fms, stones, Fucus, 8 sps, 

 max. 1. 9.8 (Loven); Christianiafjorden, 2 sps, max. 1. 9 (Asbjörnsen); Sörfjorden, Har- 

 danger, 45 fms, stones, 1 sp., 1. 9.6 (Bovallius 1880); Hitterö, 20 — 30 fms, 1 sh., 1. 

 12 (Oberg 1869); Bergen, 7 sps, max. 1. 15.9 (Sars); Trondhjemsfjorden, 1 sp., 1. 13.7 

 (Koren); D:o, Rissen, 1 — 10 m, mud, 1 sp., 1. 9.5 (Östergren ^^/i 1902); Norway, 

 without definite locality (»mare norvegicum»), many sps, max. 1. 19.2 (Marklin); D:o, 

 many sps, max. 1. 10.2 (Düben). 



Northern Norway: Tromsö, ebb, 1 sp., 1. 13.3 (Malmgren 1864); Karlsö, 30 fms, 

 shells, 1 sp., 1. 12.7 ('^/g 1864); Kjosenfjord, ebb, algse, stones, many sps, max. 1. 22.6 



! Acmsea testudinalis, mentioned by Aurivillius, 1887 ffrom Behring Island) includes A. pelta and patina, 

 which confer. 



