. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 56 ZOANTHARIA. N. W. of Bergen 30—200 fm. M. Olsson 1873, 1878; 90—200 fm. O. Mattson 1880; 100—150 fm. M. Udd strom 1880 R. M. of Bergen 90—200 fm. M. Uddstrom, G. Nilsson, M. Olsson 1880 R. M. North Sea M. Uddstrom 1880 R. M. North Sea north edge of the Fisher Bank 100—160 fm. B. Olsson R. M. Size: The colonies form large aggregates sometimes of the size of a clenched fist and almost always fixed on sponges (1 spec, on an Ascidian). In the contracted state the polyps of the largest colonies (PI. I, fig. 16) reach a
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 56 ZOANTHARIA. N. W. of Bergen 30—200 fm. M. Olsson 1873, 1878; 90—200 fm. O. Mattson 1880; 100—150 fm. M. Udd strom 1880 R. M. of Bergen 90—200 fm. M. Uddstrom, G. Nilsson, M. Olsson 1880 R. M. North Sea M. Uddstrom 1880 R. M. North Sea north edge of the Fisher Bank 100—160 fm. B. Olsson R. M. Size: The colonies form large aggregates sometimes of the size of a clenched fist and almost always fixed on sponges (1 spec, on an Ascidian). In the contracted state the polyps of the largest colonies (PI. I, fig. 16) reach a length of 19 cm. and a breadth at the base of 1 cm. In most of the colonies the polyps are however considerably smaller. Colour. In alcohol the colonr varies from dirty yellowish (PI. I fig. 10) to dirty grayish or pure white (PI. I fig. 9—11). The dirty gray colour is generally predominant. External appearance. The polyps form colonies often of large dimensions, which are attached to large sponges. The ccenenchyme is fairly thin and extensive and sometimes forms narrow out- shoots, on the end of which new polyps are formed (PI. I, fig. 9). A single colony, which by the way was not quite typical, was found on an Ascidian. The polyps generally sit quite close to each other, but sometimes the intervals between may be larger, especially when the ccenenchyme forms string-like outshoots. Even when the tentacles are completely covered by the body-wall, the polyps are generally considerably higher than broad. The breadth is however very considerable, greatest at the base and tapering upwards; sometimes the distal part maybe somewhat swollen, especially in greatly contracted polyps, though never so much as in P. dixoni and anguicomus. Otherwise, the polyps vary much in size, as can be seen from figs. 9—n on PI. I, but there is no doubt that we are only dealing with one and the same species. The body-wall is more or less wrinkled especially in the larger specimens. The cap
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1913
