Image d'archive à partir de la page 104 de l'Ingolf danois-expedition (1898). L'expédition danoise Ingolf-danishingolfexpe1517dani Année : 1898 HYDROIDA II 99 l'Islande : Vestmano 25 brasses de profondeur, à 16 kilomètres de profondeur W. Akranes (non indiqué) [Mention polyzouias Bredebugt Sertularella, profondeur 7 à 12 brasses 65°oo' N., 24°38' O., nundarfjord Adalvik 22 010 profondeur (non indiqué). Les îles Féroé : 7 miles par N. E. de Myggeiues point, 57 brasses de profondeur 6 - N. par W. de Store, 60 Kalso trou profond at north point d'Nolso, 100 - 5 miles vS.S.E. de Bispen, 50 du Parthenocissus tricuspidata Sertularella est une espèce arctique circumpolaire whic

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Archive image from page 104 of The Danish Ingolf-expedition (1898). The Danish Ingolf-expedition danishingolfexpe1517dani Year: 1898 HYDROIDA II 99 Iceland: Vestmano, depth 25 fathoms 10 miles W. of Akranes (depth not stated) [labelled Sertularella polyzouias Bredebugt, depth 7—12 fathoms 65°oo' N., 24°38' W., 22 0nundarfjord 10 Adalvik (depth not stated). The Faroe Islands: 7 miles N. by E. of Myggeiues point, depth 57 fathoms 6 — N. by W. of Store Kalso, 60 Deep hole at north point of Nolso, 100 — 5 miles vS.S.E. of Bispen, 50 Sertularella tricuspidata is a circumpolar arctic species which is extremely numerous in arctic waters. From there is penetrates far down into the boreal area (fig. LII) where it is one of the most common species, especially round the Faroe Islands, Iceland, and off West Greenland. Along the east coast of Greenland, however, it is distinctly rare. Its infrequent occurrence off the north coast of Iceland on the other hand, should probably rather be apparent, as the result of insufficient in- vestigations. Along the west coast of Norway, Sertularella tricuspidata goes southward as far as Bergen; according to the literature, it is also met with near the British Isles, but we have no certain data from here, so it would seem that this must be about the limit of its distribution. Bathymetri- cally, it belongs to the littoral region, exceptionally, however, it may, as shown by the find at the 'In- golf' St. 95, penetrate quite far down into the abyssal. 200 m. ._ tooo m. Fig. LII. The distribution of Sertularella tricuspidata in the Northern Atlantic. In the hatched regions the literature notes a scattered occurrence. '3'

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