. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 66 MEDUSA. I. The diameter of the largest specimen at my disposal is about 56 mm. The manubrium consists of a flattened stomach (Plate IV, fig. i), circular or star-shaped in outline, and a short mouth-tube. The dia- meter of the stomach is about one-fifth the diameter of the disk. The length of the mouth-tube of a well-grown specimen is about 4 mm, its diameter at the narrowest part about one-half the diameter of the stomach. The lower (distal) part of the mouth-tube is somewhat expanded,
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 66 MEDUSA. I. The diameter of the largest specimen at my disposal is about 56 mm. The manubrium consists of a flattened stomach (Plate IV, fig. i), circular or star-shaped in outline, and a short mouth-tube. The dia- meter of the stomach is about one-fifth the diameter of the disk. The length of the mouth-tube of a well-grown specimen is about 4 mm, its diameter at the narrowest part about one-half the diameter of the stomach. The lower (distal) part of the mouth-tube is somewhat expanded, divided into 4 folded lips separated by 4 slight incurvations, not by deep incisions. The stomach is fastened to the subumbrella along the edges of the proximal parts of the radial canals, thus a number of triangular pouches existing between the .subumbrella and the dorsal wall of the stomach. The number of radial canals varies (in the pre- sent material) from 12 to 17; the canals are arranged in four clusters (Plate IV, fig. i). From the cen- tral point four canals issue, each of which is very soon divided into 3—5 branches; as a rule the branching is completed within the outline of the stomach, so that apparently the radial canals arise separately from the periphery of the latter. The fully developed canals reach the circular vessel,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Danish Ingolf-Expedition (1895-1896); Københavns universitet. Zoologisk museum. Copenhagen H. Hagerup
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
