. Die dänische Ingolf-Expedition. Marine Tiere - arktischen Regionen; Wissenschaftliche Expeditionen; arktischen Regionen. 11 71 Die gonotlieciie IIYUROinA werden Der apophyse Neben tlic sessile sarcotheca befestigt. Voll orown Gon - aiigia wurden bisher nicht gefunden. Material: "Ingolf" St. 27 64° 54' N, 55° 10' W., Tiefe 393 Klafter 3,8° - 34, ich 65° 7' N, 54^17' W., 55 Grönland: Davis Strait (ohne weitere Angaben) [type Exemplare von Pbmmlaria groenlandica Island: Ingolfshcifdi q '/j Meilen in N. von E.'/j E., Tiefe 53 Klafter. Levinsen (1893 P-'^3) gibt eine sehr ausführliche Beschreibung dieser s

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. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. IIYUROinA 11 71 The gonotlieciie are attached to the apophyse beside tlic sessile sarcotheca. Fully orown gon- aiigia have not yet been found. Material: "Ingolf" St. 27 64°54' N., 55° 10' W., depth 393 fathoms 3, 8° - - 34, 65°i7' N., 54^17' W., _ 55 _ Greenland: Davis Strait (without further details) [type specimens of Pbmmlaria groenlandica Iceland : Ingolfshcifdi q'/j miles in N. by E. '/j E., depth 53 fathoms. Levinsen (1893 P- '^3) gives a very detailed description of this species, which he incorrectly regards as different from vSars's Pl/tii/iilan'a gracilliuia. He has however, in common with others who. 2 00 m. »_„ 600 m. .. loQO m. 2 000 m. Fig. XXXV. The localities of Polynemertesia gracillima in tlie Northern .-Vtlantic. In the hatched region the occurrence according to the literature is common, although scattered. have investigated the species, overlooked its typical sessile sarcotheca on the apophyses (fig. XXXIV) It is noticeable that a mamelon occurs not only on the primary but on all the apophyses in the colony. The idea that it should, as Nutting (1900) believes to be the case with other species, form the point of origin of the gouothecse, is due to inadequate investigation; the gonothecas have their point of attachment by the side of this sarcotheca. Levinsen's description incorrectly gives the impression that he has had grown gonothecae before him at the time; they are, however, only quite young stages, and grown gonangia have thus not been described for this species. Polynemertesia gracilliuia is plainly- a southern visitor to the northern waters, and has strangely enough not yet been recorded in the British waters (fig. XXXV). The "Ingolf" was able to furni.sh. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of the

Stockbilder mithilfe von Tags suchen

• bookcentury1800
• bookdecade1890
• booksu
• bücherubjectarcticregionen