. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ACTINIARIA 109 character, the muscle-layers almost all waning, and the mesogloea and the endoderm attenuated. The ecto- derm of the acrospheres is very liigh, in comparison with the thin mesogloea and the endoderm. It contains large nematocysts, most densely packed, arranged like paHsades, of equal width and of variable size, from 48 to 106 -X 2!i, occupying almost the whole height of the ectoderm. Besides these, there are a little broader nematocysts with visible basal part to the spiral thread, 72—98 x 3,5—4 fi in size. Th
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ACTINIARIA 109 character, the muscle-layers almost all waning, and the mesogloea and the endoderm attenuated. The ecto- derm of the acrospheres is very liigh, in comparison with the thin mesogloea and the endoderm. It contains large nematocysts, most densely packed, arranged like paHsades, of equal width and of variable size, from 48 to 106 -X 2!i, occupying almost the whole height of the ectoderm. Besides these, there are a little broader nematocysts with visible basal part to the spiral thread, 72—98 x 3,5—4 fi in size. The ectodermal and the endodermal muscles are absent or represented by very few muscle-fibrillae. The stalk of the tentacles is of another structure (fig. 137 lower part). The ectoderm is thinner than in the acrospheres and of about the Fig- 137. 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 Ingolf (Cruiser); Danish Ingolf-Expedition (1895-1896). Copenhagen : H. Hagerup
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscienti, bookyear1921
