. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fig. 5. Daontesia praelonga. Section of two mesenteries of the second and third cycles in the region of the ciliated tracts. numerous strata. The greater part of the papillae is formed by the cuticle, whereby the jjapillae come to have a very characteristic appearence. In the figure 1 PI. V, I have given a longitudinal section of some papillae with contiguous parts of the column-wall. IJetweeii the chitinized ectoderm-cells gland cells are ]irol)al)ly intercalated, though they were torn up
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. Fig. 5. Daontesia praelonga. Section of two mesenteries of the second and third cycles in the region of the ciliated tracts. numerous strata. The greater part of the papillae is formed by the cuticle, whereby the jjapillae come to have a very characteristic appearence. In the figure 1 PI. V, I have given a longitudinal section of some papillae with contiguous parts of the column-wall. IJetweeii the chitinized ectoderm-cells gland cells are ]irol)al)ly intercalated, though they were torn up during sectioning. The mesogloea of the column is of ordinary thickness and extended into the papillae. The cinclides .seem to be exclusivelv invaginations of the ectoderm. The ectoderm of the scapulus is about as thick as that of the scapus, its nematocysts numerous. The circular of the column are weak, the sphincter on the other hand very strong, long and broad. It occupies the whole, strongly thick- ened of the .scapulus and the uppermost part of the scapus, and is wholly separated from the endodormal circular muscles of the column (fig. 1). Its muscles are small in the lower- most i)art, in other parts it consists of larger and smaller meshes and its structure is alveolar. They are of about the same width but diminish rather rapidly proximally. The ectoderm of the tentacles is high, its nematocysts few, its spirocysts numerous. The longitudinal muscles of the tentacles are ectodermal and developed to the usual extent. The radial muscles of the oral agree with the longitudinal of the tentacles, and are about equally developed at the insertions of. 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. Zoolo
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
