. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ITd2) Fig. 24. Raja batis. The terminal part of the right appendage, from the dorsal side, strongly dilated (much reduced). A sound goes through the bottom of the appendix-slit, vl the soft, ventral dermal lip; T^ the terminal piece Ti covered by mucous membrane with the dermal leaves bl\ da a firm dermal fold, dotted with small holes on the edge. Lv the ventral pocket, Ld, Ld' the two dorsal pockets; d, dl the dorsal lip with the enclosed skeletal parts d and Td2\ Rd' a dermal fold, supported by a plate-shaped prolongation
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ITd2) Fig. 24. Raja batis. The terminal part of the right appendage, from the dorsal side, strongly dilated (much reduced). A sound goes through the bottom of the appendix-slit, vl the soft, ventral dermal lip; T^ the terminal piece Ti covered by mucous membrane with the dermal leaves bl\ da a firm dermal fold, dotted with small holes on the edge. Lv the ventral pocket, Ld, Ld' the two dorsal pockets; d, dl the dorsal lip with the enclosed skeletal parts d and Td2\ Rd' a dermal fold, supported by a plate-shaped prolongation of the dorsal marginal cartilage; Ti\ Tv2 dermal projections supported by the skeletal parts marked with the same letters. M In specimens with quite short, undeveloped appendices, shorter than, or of an equal length with, the fin-mem- brane (the free part from 2,5-3,5cm jn length), we, as might be expected, do not find much of these elaborate structures; in such young appendices with all parts still soft the appendix-slit is easily opened and quite spread, and then the walls of the slit are seen to be smooth and simple, upon the whole without recesses or folds, also in the terminal part; one strongly pronounced dermal fold is however seen along the ventral lip; the inner, already plate-shaped edge of this fold represents the spongy-porous dermal fold (da) in the adult, and in the lateral part of it the large skeletal part T3 will develop. The Ingolf-Expedition. II. 2. °. 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 Ingolf (Cruiser); Danish Ingolf-Expedition (1895-1896). Copenhagen : H. Hagerup
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscientificexpedition
