Pecten imbrifer forekommer paa de større dyb langs 
vor vest- og nordkyst. Ved sydkysten synes den derimod 
at mangle. Den er endvidere kjendt fra Karahavet, Novaja 
Semlja, Barentshavet, Spitsbergen, Færøerne, Island, Grøn- 
land og Nordamerikas østkyst. Artens udbredelse mod syd 
kan for tiden ikke med sikkerhed angives, da den hos et 
flertal af forfattere har været sammenblandet med den 
nærstaaende af Forbes fra Ægeerhavet beskrevne pecten 
hoskynsi. Den bathymetriske udbredelse er 30—650 fy. 
Fossil er den funden i Norge og Italien. 
Pecten imbrifer occurs in the great depths along the 
west and north coasts of Norway, but appears, to be absent 
from the south coast. It has also been found in the Kara 
Sea, Novaja Semlja, the Barents Sea, Spitsbergen, the 
Faroe Isles, Iceland, Greenland, and on the east coast of 
North America. Its distribution southwards cannot at 
present be stated with certainty, as the majority of writers 
have confounded it with the nearly-allied Pecten hoskynsi 
from the Ægean Sea, described by Forbes. Its bathymet- 
rical distribution is from 30 to 650 fathoms. It is found 
as a fossil in Norway and Italy. 
Pecten grænlandicus, Sowerby. 
Pecten gronlandicus, Sowerby, Thes. Conch., part 1, 1847. p. 57, Pl. 13, fig. 40. 
Findested. Stationerne 223, 224, 257, 261, 262, 
267, 270, 273, 323, 326, 338, 363; Jan Mayen, 30 fv. og 
Advent Bay, 30 fv. Dybde 30—209 fy. 
Medens denne art ved vor kyst ikke blir mere end 
15 mm. lang, maalte exemplarerne fra Spitsbergen indtil 
24 mm. 
Pecten grønlandicus forekommer ved vor kyst ikke 
søndenfor Tromsø. Forøvrigt er den en cireumpolar art, 
som er kjendt fra Sibiriens ishavskyster Karahavet, Novaja 
Semlja, Spitsbergen, Frants Josefsland, Hvidehavet, Jan 
Mayen, Island, Grønland, arktisk Nordamerika, golfen ved 
St. Laurence og det nordlige af Atlanterhavet indtil vest 
af Senegambien. Den bathymetriske udbredelse er 3— 
713 fy. Fossil er den funden i Grinnelland, Maine, Skot- 
land, Norge, det nordlige Rusland og Sibirien. 
G. O. Sars, Moll. Reg. Arct. Norv., 1878. p. 23, Pl. 2, fig. 4a 
C. 
Locality. Stations 223, 224, 257, 261, 262, 267, 
270, 273, 323, 326, 338 and 363; Jan Mayen in 30 
fathoms, and Advent Bay in 30 fathoms. Depth 30 to 
260 fathoms. 
While this species does not attain a length of more 
than 15 mm. on the coast of Norway, specimens from 
Spitsbergen measured as much as 24 mm. 
Pecten grenlandicus does not occur on the Norwegian 
coast south of Tromso. It is furthermore a circumpolar 
species, known on the Arctic shores of Siberia, in the 
Kara Sea, Novaja Semlja, Spitsbergen, Franz Josef Land, 
the White Sea, Jan Mayen, Iceland, Greenland, arctic 
North America, the Gulf of St. Lawrence, and the North 
Atlantic down to the west of Senegambia. Its bathyme- 
trical distribution is from 3 to 713 fathoms. It is found 
as a fossil on Grinnell Land, in Maine, Scotland, Norway 
northern Russia, and Siberia. 
Pecten similis, Laskey. 
Pecten similis, Laskey, Mem. Werner. Soc., vol. 1, 1811, p. 387, Pl. 8. fig. 8. 
Pecten similis foreligger kun fra en lokalitet, Husg, 
40—60 fy, Den er almindelig paa de storre dyb ved vor 
syd- og vestkyst. Nordenfor Lofoten blir den mere sjelden, 
men er dog funden helt op til Vadsø. Mod syd gaar denne 
art til Madeira, Middelhavet, Adriaterhavet og Ægeerharvet. 
Den bathymetriske udbredelse er 15—703 fv. Fossil er 
den funden 1 England, Belgien, Italien og Rhodes. 
Forbes & Hanley, Brit. Moll., vol. 2, 1853, p. 293, Pl. 52, fig. 6, Pl. S, fig. 1. 
G. O. Sars, Moll. Reg. Arct. Norv., 1878, p. 22. 
Pecten similis was only found in one locality, namely 
Husø, in depths of from 40 to 60 fathoms. It is common 
in the deep water off the south and west coasts of Norway. 
It is rarer north of Lofoten, but is found as far north as 
Vadsø. Southwards it extends to Madeira, the Mediter- 
ranean, the Adriatic, and the Ægean Seas. Its bathy- 
metrical distribution is from 15 to 708 fathoms. It is 
found as a fossil in England, Belgium, Italy and Rhodes. 
Den norske Nordhavsexpedition: H. Friele. Mollusca III. 
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