. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA 31 Corymorpha nutans M. vSars. 1835 Corynwrplm nutans^ M. Sars, Beskrivelser og lagttagelser p. 7, PI. i, Fig. 3. The hydiocaulus, when extended, attains a height of 100 nun. It is broad at the basis, attached to the snbstratum by nnmerous rhizoids, and tapering upwards till it reaches its least breadth closely below the polyp. The basis of the polyp is broad and surrounded by a proximal whorl consisting of up to 50 tentacles, which, when extended, attain a length of 30 mm. The di
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. HYDROIDA 31 Corymorpha nutans M. vSars. 1835 Corynwrplm nutans^ M. Sars, Beskrivelser og lagttagelser p. 7, PI. i, Fig. 3. The hydiocaulus, when extended, attains a height of 100 nun. It is broad at the basis, attached to the snbstratum by nnmerous rhizoids, and tapering upwards till it reaches its least breadth closely below the polyp. The basis of the polyp is broad and surrounded by a proximal whorl consisting of up to 50 tentacles, which, when extended, attain a length of 30 mm. The distal tentacles are small and placed round the orifice in a main whorl composed of several irregular circles quite closely set The gonophores are developed into free medusae with four radial canals, one well-developed tentacle and three rudimentary ones. The gonophores are developed on 15—20 blastostyles, arising. 200 m. bQom. ._ .looom. zooom* Text-fig. G. The habitat of Corymorpha nutans in the Northern Atlantic. (In the hatched regions the littcrature denotes a scattered, allthough common occurence). closely above the proximal whorl of tentacles. The blastostj-les bear small alternating branches, each provided with a large number of gonophores. Material: Iceland, 16 minutes N. W. Akranes, depth 26—30 fathoms (a couple of )-oung polyps). The occurrence of the species is typically boreal. It is indigenous to the middle parts of the littoral region. Towards the north it goes along the coast of Norway as far as Lofoten and towards the south it penetrates to the northern parts of France. The species is recorded by Jiiderholm (1909) from Matotschkin Schar (Nova Zembla) at the depth of between 2 and 5 fathoms. This find is most peculiar and mysterious. Corymorpha nutans occurs not rarely in the North Sea, and I think Hart- laub (1907) is right in supposing the specimen from the North Sea recorded by me (1905) as a Cory-. Please note that these images are extracted from scanned p
Size: 2067px × 1209px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
