Archive image from page 31 of The Danish Ingolf-Expedition (1914). The Danish Ingolf-Expedition danishingolfexpe0505ingo Year: 1914 o 200 111. depth 600 - — A Pliobothrus symmetricus A — ineotiipl. geograph. data. • Stylaster gemmascens O — roseiis + (Allopora) norvegicus Text-fig. F. Map showing the localities of the Stylasteridae in the North Atlantic and the Norwegian Sea, - I3°° The study of the occurrence of the North Atlantic Stylasterids shows several biogeographical features of interest (cf. Chart Text-fig. F). — PliobotJirus symmetricus was first described from the waters round a
Archive image from page 31 of The Danish Ingolf-Expedition (1914). The Danish Ingolf-Expedition danishingolfexpe0505ingo Year: 1914 o 200 111. depth 600 - — A Pliobothrus symmetricus A — ineotiipl. geograph. data. • Stylaster gemmascens O — roseiis + (Allopora) norvegicus Text-fig. F. Map showing the localities of the Stylasteridae in the North Atlantic and the Norwegian Sea, - I3°° The study of the occurrence of the North Atlantic Stylasterids shows several biogeographical features of interest (cf. Chart Text-fig. F). — PliobotJirus symmetricus was first described from the waters round about Florida and must be fairly common there between 190 and 300 metres. It has been found by the »Ingolf« on the steep slope off the south coast of Iceland towards the depths of the Atlantic in 594 and 658 metres. According to Duncan (1874 p. 336) the .Porcupines obtained a single specimen in the cold area of the Faeroe Channel; unfortunately he does not state the exact locality. We thus have a species here which belongs to the warm Atlantic waters and normally is not able to penetrate in over the submarine ridge, which towards the south separates the Norwegian Sea from the depths of the Atlantic. The one find in the cold area must be a pure chance and forms a parallel to the single and scattered finds which have been made here and there in the Norwegian Sea of other typical warm water forms among the Hydroids.
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Keywords: 1910, 1914, archive, arctic_ocean, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, ingolf_cruiser_, page, picture, print, reference, scientific_expeditions, vintage
