Archive image from page 46 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 HVDROIDA II 39 males are very elongated oval, the females elongated oval to sausage-shaped, highly curved, with a short cylindrical neck in the middle or on the basal half of the gonotheca, and on the concave side of the same. Opening margin level; in the opening itself a pair of hydranths. Material: 'Thor' 63=30' N., 20°i4' W., depth 80 metres. The Faroe Islands: Boronses 13 miles in N75W., depth 30 fathoms. On a previous occassion (1913 p. 13) I stated that Hal
Archive image from page 46 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 HVDROIDA II 39 males are very elongated oval, the females elongated oval to sausage-shaped, highly curved, with a short cylindrical neck in the middle or on the basal half of the gonotheca, and on the concave side of the same. Opening margin level; in the opening itself a pair of hydranths. Material: 'Thor' 63=30' N., 20°i4' W., depth 80 metres. The Faroe Islands: Boronses 13 miles in N75W., depth 30 fathoms. On a previous occassion (1913 p. 13) I stated that Halecium Beanii should be regarded as a variant of Halecium halecinum; further investigations have, however, shown that this is not correct, even though the two species, more particularly in a sterile state, may often enough be difficult to distinguish. Fertile female colonies are not easily confused, the form of the gonotheca; being typically different; in comparison with the follow- ing species it should be noted that the aperture in Halecium Bc/ii lies roughly in a line with the basal and distal end of the gonotheca, and that the neck axis closely approaches, if not entirely coinciding with, this line. (Fig. XIII). The bran- ches are, in Halecium Beanii, often slenderer than in Halecium halecinum and Halecium scutum and the apophyse is somewhat more marked; in addit- ion, the basal chamber of the secondary hydro- theca is symmetrically developed, and not asym- metrical as in Halecium halecinum; finally also, the oblique position of the hydrotheca aperture as towards the axis serves to distinguish Halecium Beanii from the two related species mentioned. The geographical data for Halecium Beanii are extremely unreliable as regards the northern waters; the species is, as I have frequently been able to perceive, often confused with Halecium scutum in arctic, with Halecium halecinum in boreal areas. In all probability, it is a heat-loving form, which exceptionally penetrates into th
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Keywords: 1910, 1918, archive, arctic_ocean, book, bookauthor, bookdecade, bookpublisher, booksponsor, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, ingolf_cruiser_, mblwhoi_library, page, picture, print, reference, scientific_expeditions, vintage, zimmermann_a_albrecht_b_1860
