Archive image from page 311 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5apt1a4daniuoft Year: 1899-1953 32 CERIANTHARIA. Ill addition, thick-walled nematoeysts occur very rarely (length 24—2611). The ectodermal musculature is moderately developed (text-fig. 6), and is much feebler than in specimens of Cerianthus lloydii of the same size. The connective tissue processes too on which the muscles rest are thinly scattered. The structure of the tentacles shews no deviation from the Cerianthid type. The bulk of the nematoeysts consists of spirocysts. In
Archive image from page 311 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5apt1a4daniuoft Year: 1899-1953 32 CERIANTHARIA. Ill addition, thick-walled nematoeysts occur very rarely (length 24—2611). The ectodermal musculature is moderately developed (text-fig. 6), and is much feebler than in specimens of Cerianthus lloydii of the same size. The connective tissue processes too on which the muscles rest are thinly scattered. The structure of the tentacles shews no deviation from the Cerianthid type. The bulk of the nematoeysts consists of spirocysts. In addition, thick-walled granulated nematoeysts are very frequently found. They are rather larger in the marginal than in the labial tentacles (34—3/) 24 or 26//). The ectoderm attains a thickness; the ectodermal muscles are slight. The structure of the oral disc agrees with that of the tentacles; the radial musculature is rather more developed. The structure of the stomatodaeum agrees with that of the stomatodaeum of Cerianthus Uoydii, save that the mucus cells are rarer. The nematoeysts are thick- walled in the upper portion and agree with those of the labial tentacles: in the aboral portion they are thick-walled, transparent, and considerably larger (48 x 12—14//). The spirocysts are thinly scattered. The ridges developed in the midmost portion of the stomatodaeum are broader and only half as high as in C. lloydii. As a result of this, the mesogloeal processes are broader and shorter than in that species. The structure of the siphonoglyph also agrees in the main with that of other Ceriantharia, though it is less differentiated from the rest of the stomatodaeum. The mucus cells are sparser than in C. lloydii. The structure of the hyposulcus and hemisulci does not differ from that of the siphonoglyph. The mesenteries (text-fig. 7). The directive mesenteries are small and insignificant, with no distinct hemisulcus. Protomesenteries 2 reach right down to the a
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Keywords: 1890, 1899-1953, archive, arctic_regions, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, k_benhavns_universitet_zoologisk_museum, marine_animals_arctic_regions, page, picture, print, reference, scientific_expeditions, vintage
