. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. UmA. â f' " A " " B " «c" " D Textfig. 170. Diagram of the size of the nematocysts in some Cribrinids (compare the text!) pharynx (b) of some examined Cribrinids, I have in the textfigure 170 put together the length of the nematocysts. The size of the nematocysts in Cribrina stclla (A) is measured in 19 specimens, in Cribrina spetsbergensis [B] in 12, in Cribrinopsis similis (C) in 23, and in Urticina felina crassicornis [D) in 30. The length of the Unes repr
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. UmA. â f' " A " " B " «c" " D Textfig. 170. Diagram of the size of the nematocysts in some Cribrinids (compare the text!) pharynx (b) of some examined Cribrinids, I have in the textfigure 170 put together the length of the nematocysts. The size of the nematocysts in Cribrina stclla (A) is measured in 19 specimens, in Cribrina spetsbergensis [B] in 12, in Cribrinopsis similis (C) in 23, and in Urticina felina crassicornis [D) in 30. The length of the Unes represents the variation in [i of the length of the nematocysts in the different specimens. While the length of nematocysts in Cribrinopsis similis is about the same in the tentacles and in the actinopharynx, it is more or less different in the other species; the difference is especially great in Urticina felina. As the table shows, these species are easily identified by examinating the size of the nematocysts. I especially wish to point out how important the nematocysts may be to the systematizing, and to call the attention to the fact that the size of the nematocysts is as good a systematic character as any other. Urticina felina (1,.) Marenz. ri. 4. Figs. 1â4. Diagnosis: Number of tentacles and mesenteries unto about 160. Tentacles in contracted state longitudinally sulcated. Nematocysts of the column smaller than those of the tentacles, those of the actino- pharynx from two and a half unto three times larger than the larger nematocysts of the tentacles. Nemato- The Ingolf-Expediliuti. V. 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
