. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 195. weak ectodermal, radial muscles. Actinopharynx with few (about 10) longitudinal ridges. Pairs of mesen- teries arranged hexamerously (6 + 6 + 12); only 6 pairs perfect. Parietobasilar muscles like those of A. jan mayeni. T}^ical nematocysts in the ectoderm of the colunm?, in the tentacles absent (? or if present very sparse). Particular stinging capsules of the stinging battery very numerous 53—75 x 11—13/.' thickness, in the region of the sphincter, however, very thick. Th
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIARIA 195. weak ectodermal, radial muscles. Actinopharynx with few (about 10) longitudinal ridges. Pairs of mesen- teries arranged hexamerously (6 + 6 + 12); only 6 pairs perfect. Parietobasilar muscles like those of A. jan mayeni. T}^ical nematocysts in the ectoderm of the colunm?, in the tentacles absent (? or if present very sparse). Particular stinging capsules of the stinging battery very numerous 53—75 x 11—13/.' thickness, in the region of the sphincter, however, very thick. The sphincter is very strong and recalls that of A. jan mayeni. The muscle meshes are small and now very closely packed, now more sparse; the sphincter shows, as far as I can see, no tendency to stratification. The endodermal circular muscles are weak. The ectoderm of the tentacles is high and probably contains no typical nematocysts, if really present they are very sparse. The outer tentacles are on the outside of the base provided with a stinging battery as in A. jan mayeni. The nematocysts are, however, smaller here and variate in both specimens between 53 and 75 // in length and II—13 PL in breadth. The spirocysts of the tentacles are extraordinarily numerous, between 22 X 2 to 55 X, 3,5 II. in size. The longitudinal muscles of the inner tentacles are much weaker on the outside of the base than on the inside. The inner folds are namely much closer and often more than double as high as the outer folds. They are often branched (textfig. 187 transverse section of inner tentacle). In contradistinction to 25' Textfig. 187. Anthosactis ingolfi. Transverse section of inner 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 muse
Size: 1465px × 1705px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
