. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA II 6i. ioo m 6000. looom. jooom Fig. XXVIII. Finds of Polyplumaria flabellata in the Northern Atlantic. one or two alternating apophyses. The apophyse proceeds asymmetricalh' from the base of a cauline hydrotheca; this is surrounded by a pair of supracalyciue sarcothecas, and a third sarcotheca situate proximally and a little to the side of the median line, somewhat removed from the base of the hydro- theca, on the side of the median line opposite to the apoph)'se. The hydrocladia
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA II 6i. ioo m 6000. looom. jooom Fig. XXVIII. Finds of Polyplumaria flabellata in the Northern Atlantic. one or two alternating apophyses. The apophyse proceeds asymmetricalh' from the base of a cauline hydrotheca; this is surrounded by a pair of supracalyciue sarcothecas, and a third sarcotheca situate proximally and a little to the side of the median line, somewhat removed from the base of the hydro- theca, on the side of the median line opposite to the apoph)'se. The hydrocladia are divided by trans- verse nodes into internodia, which have about the middle a hydrotheca with a supracalyciue pair of sarcothecse, on low apophyses near the opening of the hydrotheca, and a proximal, unpaired sarcotheca in the median line near the proximal end of the internodium. The basal internodium on the primary hydrocladium has two proximal unpaired sarcothecje in the median line;'at the base of this inter- nodium's hydrotheca there appear, in fertile colonies, apophyses to the secondary hydrocladium, which is of the same structure as the primary. The hydrothecce are on the hydrocladium about twice as long as broad; on the stem somewhat shorter; the}- have a somewhat outward curving opening margin, and are fused throughout their whole length with the internodium. The gonothecse are situate on the stem or close under the base of the proximal hydrotheca; on the primary and secondary hydrocladia; they have a short, often rudimentary stalk. The gonothecse are pear-shaped, often curved, rounded off somewhat asymmetrically distally, with a broad opening; they have two sarcothecse basally. Material: "Ingolf St. 24 63°o6' N., 56°oo' W., depth 1199 fathoms 2,4° - - 55 63°33' N., i5°02' W., - 316 - 5,9° - - 98 65 38' N., 26^27' W., - 138 - 5,9°. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
