. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 12 BRACHIOPODA j$xr ^%f ^ pa'. Chart 7. Distribution of Diestothyris spitzbergensis (Day.). This well .studied species is by far the most common Brachiopod in the material both as regards the number of specimens and the number of localities. Of special interest is the catch of the "Dana" at St. 6001 (the Wywille-Thompson ridge) where no less than 638 specimens were taken, adult and juvenile forms pell-mell. In another locality close by, 65 specimens were taken: no doubt the speci
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 12 BRACHIOPODA j$xr ^%f ^ pa'. Chart 7. Distribution of Diestothyris spitzbergensis (Day.). This well .studied species is by far the most common Brachiopod in the material both as regards the number of specimens and the number of localities. Of special interest is the catch of the "Dana" at St. 6001 (the Wywille-Thompson ridge) where no less than 638 specimens were taken, adult and juvenile forms pell-mell. In another locality close by, 65 specimens were taken: no doubt the species is one of the most, gregarious of the otherwise occasionally sociable brachiopods. Some of the individuals were fastened to small pieces of basalt, some to each other's shells or to the shells of some tectibranch gastropods; 4 very small specimens to the pine of an Echinid; some in the cavity of a sponge, but by far the greater part were free. Many of them had serpulid tubes attached to them, others were covered with a coating of Bryo- zoans or sponges etc. .No doubt the species is locally a characte- ristic component of the animal community and is of importance as a substratum for the epifauua. As to the occurrence of the species in the North Atlantic the present material shows that it is by far the most common Bra- chiopod in the waters south of Iceland and between Iceland and Scotland. On the whole it is found in abundance in many localities and is widely spread in the boreo-arctic region especially along the coasts of Norway, the Shetlands, Scotland and the Atlantic coasl of North-America. Along the east coast of Greenland and the Norwegian west coast it penetrates into the arctic regions, although it is much more scattered and less numerous in arctic waters. Its bathymetrical distribution ranges from the sublittoral zone, where it is especially at home, to about 3500 m in the abyssal region. Diestothyris spitzbergensis (Davidson). North Atlantic records: 1878 Terebratel
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
