Archive image from page 206 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5dpt12daniuoft Year: 1899-1953 MEDUS. Ill FiS- 3. Distiiljiiiidii in tlir iiortliciii Atlantic (it ILiliscfiu Ingehnn. new lecorils; Q recdids iidt yi't ijiihlislii'il. Dt'scriiit ion: (PL I tit;. 5) UmliivUa almost lieniisphciiral. its central portion consisting of a thick, hemispherical mass of jelly, bv a slight constriction separated from the marginal portion which has fairly thin walls; the apical gelatinous portion com- prises nearly two thirds of the entire height of
Archive image from page 206 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5dpt12daniuoft Year: 1899-1953 MEDUS. Ill FiS- 3. Distiiljiiiidii in tlir iiortliciii Atlantic (it ILiliscfiu Ingehnn. new lecorils; Q recdids iidt yi't ijiihlislii'il. Dt'scriiit ion: (PL I tit;. 5) UmliivUa almost lieniisphciiral. its central portion consisting of a thick, hemispherical mass of jelly, bv a slight constriction separated from the marginal portion which has fairly thin walls; the apical gelatinous portion com- prises nearly two thirds of the entire height of the medusa. The stomach (PL I fig. 6) is very broad and flat, slightly conical in shape; it has a circular outline, and the mouth is a cir- cular opening varying in width according to the state of con- traction. There are eight broad radial canals and a broad circular vessel. The gonads (PL I fig. 6) are broadly oval, comprising about two fifths of the length of the radial canals and placed somewhat nearer to the stomach than to the circular vessel; in female specimens each gonad contains about seven large eggs in one layer. The gonad is usually rather flat, but in certain states of contraction it is doubled up after a longitudinal line and thereby attains a laterally appearance. In the specimens examined almost all the tentacles ar(> l>roken off, leaving only the basal stumps (PL I fig. 7); a few small tentacles are retained, showing that they have the same structure as in other species of Halicreasidie (PL I fig. 8). The numiier of tentacles is usually about 96 (12 in each octant); in some of the octants there may be 11 or 13; the full numii('rradials is rather irregular; two small ones or two fairlv large ones are frequently placed side by side. The .statocysts (PL II figs. 1-2) are elongated club-shaped, as in other species of Halicreasidae; the endoderm core consists of about 10 cells each with a large nucleus except the two or three distal cells, in wh
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Keywords: 1800, 1890, 1899-1953, archive, arctic_regions, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, gerstein, gerstein_university_of_toronto, historical, history, illustration, image, k_benhavns_universitet_zoologisk_museum, marine_animals_arctic_regions, page, picture, print, reference, scientific_expeditions, toronto, vintage
