. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 98 ACTINIARIA Diagnosis: Nematocysts in the ectoderm of the cohimn 25—29 (34) X 3,5 /i, in the tentacles 29 —39 X 4—5 fi, in the actinophan-nx 29—41 X 4—5 /i, Spirocysts of the tentacles about 17—26 X 2,5 /i. IvOngitudinal muscles of the tentacles well developed. Conchula with three lobes, in extended state large, in contracted more or less distinct. Muscle-pennons in the mesenteries of the first cycle strong, expanded over almost the whole breadth of the mesenteries. The folds of the penn
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 98 ACTINIARIA Diagnosis: Nematocysts in the ectoderm of the cohimn 25—29 (34) X 3,5 /i, in the tentacles 29 —39 X 4—5 fi, in the actinophan-nx 29—41 X 4—5 /i, Spirocysts of the tentacles about 17—26 X 2,5 /i. IvOngitudinal muscles of the tentacles well developed. Conchula with three lobes, in extended state large, in contracted more or less distinct. Muscle-pennons in the mesenteries of the first cycle strong, expanded over almost the whole breadth of the mesenteries. The folds of the pennons rather high, in transverse-sec- tions pectinate. Parietal muscles weak, not expanded on the column. Oral stomata and small marginal sto- mata present. Colour: light purplish brown with bluish iridescence, similar to that of Cyaneci arctica (Verrill). The largest specimen was brownish, in alcohol. Dimensions: The largest specimens dissected by mj-self were 3,5 cm long and 2,5—3 cm broad; the length of the tentacles about 0,9 cm. Occurrence: West-Greenland Egedesminde (Levinsen 1877) i sp., Nordre Stromfiord, St. 9 a (Nordmann) i sp., Greenland without distinct locality (Fasting). Further distribution: North America from Cape Cod to Fundy bay. Nahaut Mass. to Eastport Maine (Verrill), Arctic ocean to Cape Cod (Parker) as larva on Cyanea arclica, as adult at Eastport Maine (Verrill). Exterior aspect: The specimens were rather well preserved. The form of the body was more or less egg-shaped, according to a strong contraction of the distal and basal ends. The column is smooth with somewhat distinct longitudinal furrows corresponding to the insertions of the mesenteries; besides these, there are also transversal furrows produced by the contraction of the column. A distinct fossa is present. The tentacles are short, cylindrical, with a porus in the apex, and more or less longitudinally sulcated, ac- cording to the state of contraction. The number of the tentacles is
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
