setter vi her en fortegnelse over de skalrester af grundt- 
vandsmollusker, som af Nordhavsexpeditionen fandtes strøet 
ud over havdybet. Skalresterne toges paa station 312, 
749 54" N. Br., 14° 53’ Ø. Lg. 658 fr., og stat. 353, 
179 584 No Br, 5910" Øl Ihe, 01883 fy. 
Pecten islandicus, Mill. Station 312. Flere rudi- 
menter og et vel bevaret ungt exemplar. 
”oldia arctica, Gray. Station 312. Tre ulige velbe- 
varede skaller, Station 353, kun et rudiment. 
Yoldia intermedia, M. Sars, Station 312. Ht større 
og et mindre vel bevaret skal. 
Astarte borealis, Chemn. Station 312. 
skaller med vel bevaret epidermis. 
Serripes grønlandicus, Chemn, Station 312. To sam- 
menhgrende skaller med ganske vel bevaret epidermis og 
et enkelt eroderet skal. Station 353. Friske fragmenter. 
Venus fluctuosa, Gould. Station 312. Et skal med 
vel bevaret epidermis. Station 853. To, noget angrebne 
skaller. 
Lyonsia arenosa, Møll. 
ment. 
Mya truncata, Lin. Station 312 og 353. Rudimenter, 
Saxicava arctica, Lin. Station 312. Et stærkt slidt 
større skal og et mindre exemplar med begge skaller zn 
situ og hængselligamentet vel bevaret. 
Margarita helicma, Phipps. Station 312. Rudiment. 
Lacuna crassior, Mont. Station 353. Et noget lede- 
ret exemplar. Da det var friskt, var epidermis vel be- 
varet. 
Trophon clathratus, Lin. 
noget slidt exemplar. 
Tre umage 
Station 353. Et frisk rudi- 
Station 312. Et stort, 
Paa medfølgende kartskisse har vi angivet de to sta- 
tioner, hvor ovennævnte skalrester af grundtvandsmollusker 
toges. Samtidig har vi indtegnet det havstykke, hvor In- 
golfexpeditionen fandt sine skallevninger. 
I Frieles dagbog fra expeditionen anfører han, at 
paa station 858 bestod ,bunden af binoculinler med tal- 
rige, tildels store stene. Trawlbommen kom brækket op*. 
Der anvendtes i 1878 væsentlig beamtrawlskrabninger. Paa 
en noget vestligere station, station 350, 1686 fy., omtrent 
midt mellem Spitsbergen og Grønland, tabtes trawlen. 
Efter erfaringerne fra station 353 er der grund til at an- 
tage, at det er store stene, som har tynget saa stærkt 1 
trawlen, at tauget brækkede. Vi anfører dette for at hen- 
lede opmærksomheden paa, at der i de store dyb i Grøn- 
landshavet ligger udkastet mange og store stene. 
Det trawlnet, som benyttedes af expeditionen har 
neppe kunnet trænge mere end nogle faa centimeter ned i 
logical conditions, we give here a list of the shell-remains 
of shallow-water molluscs that were found by the North 
Atlantic Expedition, scattered over the arctic ocean depths. 
The shell-remains were found at Station 312, in 749 54’ N, 
Lat., 14° 53’ E. Long. at a depth of 658 fathoms, and 
at Station 358, in 77" 58’ N. Lat., 59 10’ E. Long., at 
1333 fathoms. 
Pecten islandicus, Mill. Station 312, several rudi- 
ments and a well-preserved young specimen. 
Yoldia arctica, Gray. Station 312, three not equally 
well preserved valves; Station 353, only a rudiment. 
Yoldia intermedia, M. Sars. Station 312, one large 
and one small, well-preserved valve. 
Astarte borealis, Chemn. Station 312, three valves. 
with well-preserved epidermis. ' 
Serripes grenlandicus, Chemn. Station 312, two mat- 
ching valves with well-preserved epidermis, and a single 
ercded valve; Station 353, fresh fragments. 
Venus fluctuosa, Gould. Station 312, a valve with 
well-preserved epidermis; Station 353, two valves somewhat 
injured. 
Lyonsia arenosa, Moll. Station 353, a fresh rudiment. 
Mya truncata, Lin. Stations 312 & 353, rudiments. 
Saxicava arctica, Lin.. Station 312, a much worn, 
large valve, and a smaller specimen with both valves 7 
situ, and the hinge-ligament in a well preserved state. 
Margarita helicina, Phipps. Station 312, a rudiment. 
Lacuna erassior, Mont. Station 353, a somewhat in- 
jured specimen. When taken out of the dredge, the epi- 
dermis was in a good state of preservation. 
Trophon dathratus, Lin. Station 512, a large, some- 
what worn specimen. 
On the accompanying sketch-map, we have marked 
the two stations at which the above shell-remains of shallow- 
water molluscs were found. We have also drawn in the 
section of ocean in which the Ingolf Expedition found their 
shell-remains. 
Friele, in his diary from the expedition, has an entry 
to the effect that at Station 353, the bottom ‘consisted of 
Binoculina Clay containing numerous, partly large, stones. 
The trawl beam came up broken’. In 1878, chiefly 
beam-trawl dredgings were made. At a somewhat more 
westerly station, Station 350 (1686 fathoms), about mid- 
way between Spitsbergen and Greenland, the trawl was 
lost. From the experience of Station 355, there is reason 
to suppose that large stones have weighed so heavily in 
the trawl, that the rope broke. We report this in order 
to draw attention to the fact that in the great depths of 
the Greenland Sea, there are many large stones lying 
scattered about. 
The trawl-net employed by the expedition was hardly 
able to force its way more than a few centimetres into 
