Archive image from page 282 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5cpt9daniuoft Year: 1899-1953 Miujrs.:. II. Fig. I. Sarsia princeps. Transversal section of supportin}» lamella of ma- nubrium, a) male iudividual, with protruding ribs on the external (ec- todermal) side; b) female individual, with almost smooth external surface. — In both figures the ecto- and cndodermal cell-layers are omitted, with the exception of the muscular elements; the ectodermal, longitudinal muscle-fibrils are seen in transverse section, partly embedded in the sur-
Archive image from page 282 of The Danish Ingolf-expedition (1899-1953). The Danish Ingolf-expedition danishingolfex5cpt9daniuoft Year: 1899-1953 Miujrs.:. II. Fig. I. Sarsia princeps. Transversal section of supportin}» lamella of ma- nubrium, a) male iudividual, with protruding ribs on the external (ec- todermal) side; b) female individual, with almost smooth external surface. — In both figures the ecto- and cndodermal cell-layers are omitted, with the exception of the muscular elements; the ectodermal, longitudinal muscle-fibrils are seen in transverse section, partly embedded in the sur- face of the supporting lamella. — Specimens from (Greenland, 'Tjalfe' Stat. 173. Manubritini. The stnicture of tlie supporting lamella exhibits a sexual dimorphism; the outer sur- face of the lamella is almost smooth in the female, whereas in the male it is provided with strongly protruding lono-itudinal ribs; on account of these ribs the surface is very nmch enlarged, making room for a consider- ably larger number of muscular fibrils than is the case in the female. The difference is shown in the transversal sections in the textfigs. la and ib. Plate I, fig. 2 presents the outer surface of the supporting lamella of a male manubrium, stained with carmine; after transference into xylol the ec- toderm has been carefully removed, and thus the ribs of the supporting la- mella are uncovered; the ril)s are running throughout the entire length of the manul)rium; their mutual distance is somewhat variable, about 25— 30// in the example, figured in plate I. The endoderm of the manubrium is a fairly low epithelium con- sisting of cvlindrical cells; in contracted condition the epithelium is densely and finely transversally folded (textfig. 2). Four well-defined, strongly pro- truding longitudinal ridges are running in a wavy manner alongside the four interradii of the manubrium (textfig. j, transversal section of a female manubrium). At the proximal end of the manubrium there is a v
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Keywords: 1890, 1899-1953, archive, arctic_regions, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, copenhagen_h_hagerup, danish_ingolf_expedition_1895_1896_, drawing, historical, history, illustration, image, k_benhavns_universitet_zoologisk_museum, marine_animals_arctic_regions, page, picture, print, reference, scientific_expeditions, vintage
