. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 20 HYDROIDA soon as it was irritated by the preservation fluid, it contracted to a length of only 9 cm., and sinuiltan- onsly the diameter of the distal portion of the polyp increased to the measure of 2-3 mm. This observation shows how little importance is, in fact, to be attached to the absolute measures of the polyp in the limitation of the species of Myriothela. While the individuals from st. 117 wholly agree with the earlier descriptions and drawings of the species, the defective spec
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 20 HYDROIDA soon as it was irritated by the preservation fluid, it contracted to a length of only 9 cm., and sinuiltan- onsly the diameter of the distal portion of the polyp increased to the measure of 2-3 mm. This observation shows how little importance is, in fact, to be attached to the absolute measures of the polyp in the limitation of the species of Myriothela. While the individuals from st. 117 wholly agree with the earlier descriptions and drawings of the species, the defective specimen from st. 125 (tab. I, fig. 8) at the first glance differs greatly. The broad, longitudinally strongly contracted basal portion is studded with blastostyles in a narrow belt, above which the polyp tapers rapidly so as to assume a conical appearance fairly reminding of the drawing by Bonne vie of Myriothela mitra (1899, tab. IV, fig. 3). However, a closer examination shows that the distal portion of the polyp has been torn Text-fig. C. Localities of Myriothela phrygia in the Nortliern Atlantic. and as its trunk above the blastostyles is studded with capitate tentacles, while the polyps of the species mentioned have no tentacles at all, a mistake of identity is out of the question. Myriothela phrygia is an arctic deep-sea form, mainly occurring in the icy water at the bottom of the northern seas. It is recorded from Taimyr (Jaderholm 1908), from the north of Norway, and from tlie depths of the ocean between Spitzbergen and Greenland (Bonnevie 1899), besides from the localities laid down in the map subjoined (Text-fig. C). The original description has been given on specimens from Greenland, from where, however, we still lack particulars as to localities. "Ingolf now adds two new finds in the waters of the Arctic Sea between Iceland and Jan Mayen. On the whole, the occurrence of the species is scattered; most of the finds are situated in high-arctic regions, and here
Size: 2057px × 1215px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
