. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 ACTINIARIA. Fig. 9. Fig. 10. Textfigs. 9—II. Arrangement of tentacles and mesenteries in Edwardsia andresi (fig. 9), E. claparedii (fig. 10) and Milne- edwardsia loveni and carnea (fig. 11). In order to show the arrangement in pairs, the imperfect mesenteries are drawn as having pennons. In fact that is not the case. in Milne-edwardsia polaris. These clusters form weak batteries of nematocysts. In the geinns Edwardsia oxid. Isoedwardsia the nematocysts of the scapus are more concentrate
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 24 ACTINIARIA. Fig. 9. Fig. 10. Textfigs. 9—II. Arrangement of tentacles and mesenteries in Edwardsia andresi (fig. 9), E. claparedii (fig. 10) and Milne- edwardsia loveni and carnea (fig. 11). In order to show the arrangement in pairs, the imperfect mesenteries are drawn as having pennons. In fact that is not the case. in Milne-edwardsia polaris. These clusters form weak batteries of nematocysts. In the geinns Edwardsia oxid. Isoedwardsia the nematocysts of the scapus are more concentrated and enclosed in so-called nemathybo- mes, forming strong batteries of stinging capsules. The nemathybomes are now arranged in 8 longitudinal rows as in E. tuberculata, claparedii and longicornis, now irregularly scattered as in , finmarchica, sipunculoidcs, intermedia and others. Possibly there arc more than 8 longitudinal rows in some species. The nemathybomes appear the most distinctly in the species with 8 rows. Here they are fewer in number, but commonly larger and form conspicuous tubercles on the scapus; on the other hand, if the nemathybomes are scattered they are smaller, Init more numerous and projecting a little or not at all over the surface of the scapus, according as tiie con- traction of the animal is strong or weak. The nemathybomes form a capsule in tlie mesogloea and are filled witli more or less numerous nematocysts and their mother-cells. The walls of the ncniathybomes are formed by the mesogloea which is only perforated in tlie ajjcx of the iiemathyliomes. Here the scapus- ectodenn is in connection witli tlic nematliybomes, and Ihrougli the aperture the nematocysts eject their. 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 un
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
