sydkyst mangler denne art, selv ved vestkysten er den 
temmelig sjelden. Først i det nordlige Norge og da særlig 
i Finmarken optræder den talrig. Den bathymetriske ud- 
bredelse er 0—1750 fv. Fossil er den funden i Norge, 
nordlige Rusland. Skotland og Sicilien. 
24 
| 
and California, This species is not found on the south 
coast of Norway, and even on the west coast it is rather 
rare. It is only in the north, and especially in Finmark, 
that it becomes numerous. Its bathymetrical distribution 
is from 0 to 1750 fathoms. It is found as a fossil in 
Norway, northern Russia, Scotland, and Sicily. 
Dacrydium vitreum, Holboll, 
Modiola(?) vitrea, Hollbøll, Møller, Ind. Moll. Grønl., 1842, p. 19. 
Dacrydium vitreum, Torell, Spitsbergens Moll., 1859, p. 139, tab. 1, fig. 2 a 
Findested. Stationerne 10, 31, 40, 48, 124, 164, 
173b, 192, 195, 225, 224, 260, 261, 262, 267, 270, 290, 
323, 326, 338, 357, 363 samt’ Hammerfest, 20 fv. Dybde 
20—1215 fy. 
Dacrydium vitreum er eu nordatlantisk art. som er 
udbredt fra Karahavet og Spitsbergen til Middelhavet og 
Azorerne og fra Grønland til Campechebugten, U. S A. 
Den er ikke funden i Christianiafjorden eller ved vor 
sydkyst, derimod synes den at vere ret almindelig ved vor 
øvrige kyst. Den bathymetriske udbredelse er 20—2435 fv. 
Fossil er den funden 1 det nordlige Rusland, Hngland, 
Tyskland og Italien. 
G. O. Sars, Moll, Reg. Arct. Norv., 1878, p. 28, tab. 3, fig. 2 
Verrill, Trans. Connecticut Acad., vol. 5, 1882, p. 579, tab. 44, fig. 8. 
ti 
| 
b. 
a—b. 
Stations 10, 31, 40, 48, 124, 164, 173 b, 
224, 260, 261, 262, 267, 270, 290, 323, 
and 563, and Hammerfest (20 fathoms). 
Locality. 
182 86, 228 
326, 338, 357, 
Depth 20—1215 fathoms. 
Dacrydium vitreum is a North Atlantic species, ran- 
ging from the Kara Sea and Spitsbergen to the Mediter- 
ranean and the Azores, and from Greenland to Campechy 
Bay. It does not occur in the Christiania Fjord nor off 
the south coast of Norway; but at other parts of the coast 
it seems to be rather common. Its bathymetrical distribu- 
tion is from 20 to 2435 fathoms. It is found as a fossil 
in northern Russia, England, Germany, and Italy. 
Astarte borealis, Chemnitz. 
Venus borealis, Chemnitz, Conch. Cab., vol. 7, 1784, p. 26, tab. 39, figs. 412, 418. 
Crassina borealis, Nilsson, Noy. Act. Holm, 1822, 
p. 188, tab. 2, fig. 3, 4. 
Astarte corrugata, Lovén, Ind. Moll. Scand., 1846, p. 37. 
Astarte borealis fandtes ved Jan Mayen, 10—15 fv., 
Advent Bay og Magdalena Bay, 20—40 fv, endvidere ved 
stationerne 280, 322 og 363. Dybde 70—260 fy. Hxem- 
plarerne fra Advent Bay, Magdalena Bay og stat. 363 til- 
hører formen placenta, Mørch. 
Fra station 312, 658 fy, og station 353, 1333 fv. 
foreligger fragmenter, som antagelig af isen er ført ud 
paa dybet. Det samme gjælder formodentlig ogsaa om de 
exemplarer, som ifølge Jeffreys erhoidtes af Valorousexpedi- 
tionen paa 1450 favnes dyb. 
Astarte borealis er en circumpolar art, som har sin 
sydgrænse ved Bornholm, Kiel, kysten af New England og 
Alaska. Wed den norske kyst er den ikke funden sønden- 
for Bergen. Den bathymetriske udbredelse er 2—260 fv. 
Den er fossil i Skandinavien, Britiske øer, Island, nordlige 
Rusland, Spitsbergen, Sibirien, Nordamerika og Grønland. 
arctica, Forbes & Hanley, Brit. Moll.. vol. 1, 1853, p. 461, Pl. 30, fig. 7 
borealis, Meyer & Møbius, Fauna v. Kieler Bucht, vol. 2, 1872, p. 95, 
Tridonta borealis, G. O. Sars, Moll. Reg. Arct. Norv., 1878, p. 50, PI. 5, fig. 
1! 
figs. 1—4. 
8 a—b. 
Astarte borealis was found in Jan Mayen (10—15 
fathoms), Advent and Magdalena Bays (20—40 fathoms), 
and at Stations 280, 322, and 363. Depth 70—260 fathoms. 
The specimens from Advent Bay, Magdalena Bay, and 
Station 363 belong to the form placenta, Morch. 
There are some fragments from Station 312 (658 
fathoms) and Station 353 (1333 fathoms), which have no 
doubt been carried out into deep water by the ice. 
This was probably also the case with the specimens which, 
according to Jeffreys, were taken by the Valorous Expedi- 
tion from a depth of 1450 fathoms. 
Astarte borealis is a circumpolar species, with its 
southern limit at Bornholm, Kiel, the coast of New Eng- 
land, and Alaska. Off the Norwegian coast, it does not 
range farther south than Bergen. Its bathymetrical distri- 
bution is from 2 to 260 fathoms. It is a fossil in Scan- 
dinavia, the British Isles, Iceland, northern Russia, Spits 
bergen, Siberia, North America, and Greenland. 
