. The Danish Ingolf-expedition. Marine animals; Marine animals; Hydrography; Hydrography; Scientific expeditions. 6o HYDROIDA II. Fig. XXVII. Localities of Polyplumaria frutescens in the Northern Atlantic. In the hatched parts the literature notes a scattered occurence without further data. of the hydrotheca. The secondary hydrocladium proceeds from beside the basal hydrotheca of the primary hydrocladium, and is of the same appearance as this. The gonothecge are fastened to the stem or the branch apophyses by a very short stalk. They are oval, with a large, somewhat asymmetrical distal opening
. The Danish Ingolf-expedition. Marine animals; Marine animals; Hydrography; Hydrography; Scientific expeditions. 6o HYDROIDA II. Fig. XXVII. Localities of Polyplumaria frutescens in the Northern Atlantic. In the hatched parts the literature notes a scattered occurence without further data. of the hydrotheca. The secondary hydrocladium proceeds from beside the basal hydrotheca of the primary hydrocladium, and is of the same appearance as this. The gonothecge are fastened to the stem or the branch apophyses by a very short stalk. They are oval, with a large, somewhat asymmetrical distal opening, and with four sarcothecse at the base. Material: "Thor" 35-57' N, 5°35' W, depth 740 metres Iceland: Vestmano, — 510 — According to Ritchie (1911 p. 223) the number of unpaired small distal sarcothecse on the internodium should vary from one to three. No such variation could be discerned in the colonies investigated by me. Polyplumaria flabellata is a very rare visitor in the northern waters (fig. XXVIII) and occurs here only in the deeper water layers. The species has altogether its main distribution in the upper parts of the abyssal region. The Vestmanna Islands mark the most northerly point where it has been found up to now; in Greenland waters it would seem to be entirelv lacking. Polyplumaria profunda (Nutting). 1900 Plumularia profunda, Nutting, Plumularidae, p. 66, pi. 8, figs. 2—3. Upright, composite pinnate colonies with branched polysiphouic main stem. The primary tube which is seen in the outer parts of the colony is divided by transverse nodes into internodia, bearing. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Danish Ingolf-Expedition, 1895-1896; Wandel, C. F. (Carl Frederik), 1843-1930; Ingolf (Ship). Copenhagen, H. Hagerup
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