Archive image from page 96 of The Danish Ingolf-Expedition (1905). The Danish Ingolf-Expedition danishingolfexpe0602ingo Year: 1905 PORIFERA. II. 89 obvious conclusion that the}- are excurrent canals; if so, we should expect to find oscula at the points of the branches. It may, however, also be possible that among the mentioned pores some may act as incurring openings, others as excurrent ones. The skeleton is chiefly constructed as in the preceding species. It consists in stem and branches of a powerful axis which is also here somewhat spirally twisted, especially in its lower part. The late
Archive image from page 96 of The Danish Ingolf-Expedition (1905). The Danish Ingolf-Expedition danishingolfexpe0602ingo Year: 1905 PORIFERA. II. 89 obvious conclusion that the}- are excurrent canals; if so, we should expect to find oscula at the points of the branches. It may, however, also be possible that among the mentioned pores some may act as incurring openings, others as excurrent ones. The skeleton is chiefly constructed as in the preceding species. It consists in stem and branches of a powerful axis which is also here somewhat spirally twisted, especially in its lower part. The lateral branches are formed in the common way. The skeleton of the branchlets is formed by a fibre more or less long according to the length of the branchlets; in the long branchlets the fibres are out- wardly very fine, and outermost they have only quite few spicules. The fibres of the branchlets are inserted in the axis in the common way. As the branchlets are arranged more or less circularly, their fibres, in a transverse section passing through a circle of branchlets, are all seen to go to the middle of the axis like the spokes of a wheel. When the layer of tissue with the branchlets and their fibres is removed, so that only the axis is left, this is seen to be transversely striated on account of the circular arrangement of the branchlets, the part of their fibres that is inserted in the axis appearing as darker circles when the other part is removed. The axes of the branches continue through the middle of the swollen terminal part, and at the outer end they spread in a somewhat peuicillate way. From the part of the axis running through the terminal knob rather regular, thin fibres issue to the surface, through which their outer ends project quite slightly (Woodcut fig. 3). Thus the whole terminal knob may be regarded as a collection of coalesced branchlets. Between the mentioned fibres in the terminal knob are moreover found some scattered spicules. In the above mentioned plac
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Keywords: 1900, 1905, 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
