Archive image from page 67 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 6o HYDROIDA II 200 m. . _ » b 0 0 m. 2000 m. 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 gonothecae are fastened to the stem or the branch apophyses by a very short stalk. They are oval,
Archive image from page 67 of The Danish Ingolf-Expedition (1918). The Danish Ingolf-Expedition danishingolfexpe0507ingo Year: 1918 6o HYDROIDA II 200 m. . _ » b 0 0 m. 2000 m. 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 gonothecae 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 sarcothecce 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 sarcothecae 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 entirely lacking. Polyplumaria profunda (Nutting). 1900 Plumularia profunda, Nutting, Plumularidae, p. 66, pi. 8, figs. 2—3. Upright, composite pinnate colonies with branched polysiphonic main stem. The primary tube which is seen in the outer parts of the colony is divided by transverse nodes into internodia, bearing
Size: 1847px × 1083px
Photo credit: © Actep Burstov / Alamy / Afripics
License: Licensed
Model Released: No
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
