. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. MEDUS.* in 13. Fig, .'). Distribution in the iiortheni Atlantic nf: % BlioiKilonema velntum; x luneriirium. Rhopalomena velatum Gegenbaur. North-Atlantic records: Rhopalonema coeruleum Browne 1906 ]). 172. - velatum VauhofEen 1912a p. 371. Bigelow 1914 p. 20. - - 1918 pp. 388, 433. - - 1926 p. 54. 1936 )). 137. Material (see the map, textfig. 5): 'Thor'"St. 71. 1 specimen - - ,300 m wire. 4 sjiec. - 11. 65 m - 4 - â Uana'" .50-6000 ni wire -
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. MEDUS.* in 13. Fig, .'). Distribution in the iiortheni Atlantic nf: % BlioiKilonema velntum; x luneriirium. Rhopalomena velatum Gegenbaur. North-Atlantic records: Rhopalonema coeruleum Browne 1906 ]). 172. - velatum VauhofEen 1912a p. 371. Bigelow 1914 p. 20. - - 1918 pp. 388, 433. - - 1926 p. 54. 1936 )). 137. Material (see the map, textfig. 5): 'Thor'"St. 71. 1 specimen - - ,300 m wire. 4 sjiec. - 11. 65 m - 4 - â Uana'" .50-6000 ni wire - 4203. 50-60(1 m - In the two localities the species was takiMi at different depths, from very near the surface to about 4000 m down, though it is possible that .some of the specimens taken in the deepest hauls were actually captured during the hauling in of the nets. At both stations the four ujipermost hauls, with 50 (iOOm wire out, were made with the 2 m ringtrawl (S 200) wit h bag of stramin; at stat. 4201 fcmr deeper hauls, with 2000 5000 m wire out, were made with a somewhat smaller net, \^/., m in o|H'ning diameter; in the deepest haul at each station the a])piiance (K 300) was much larger, 3 ni in dianietei-. Imt witli a bag of coarser net, not 57°47'N. ir43'W. Vel905 49°04'N. 14°52'W. «/6l906 56°56'N. 9°01'\V. 28/51908 47°02'N. 31°45'W. 27-28/^31 49°49'N. 30°22'W. 30/fi 1931 suitable to catch this small medusa. The duration of the hauls was also different. For the sake of comparison between the catciies it is necessary, therefore, to re-calculate the number of specimens to a certain standard. In the table below are given: the appliance used at each haul, the duration of the haul, the actual number of specimens caught, and the number of specimens reduced to number per one hour's haul with S 200. Stat. m wire out Apphance used Duration of haul Actual niunbcr of s|)i'cinu'ns Reduced number Diameter of specimens iL'lll .')()
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
