. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 6. Fig. 7. Fig. H. Fig. 6. Hahipsis occllata A. Agassiz. Transversal section through a radial canal with male gonads, x S5. — Fig. 7. Halopsis ocellata A. .Agassiz. Transversal section through a radial canal with female gonads. Three of the eggs are ready for liberation. X 120. — Fig. S. Halopsis ocellata A. Agassiz. Transverse section through the distal part of a radial canal, free of gonads. Obs. the high development of the entoderm and the narrow lumen, x 240. but sometimes we may find young canals terminating blindl
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. Fig. 6. Fig. 7. Fig. H. Fig. 6. Hahipsis occllata A. Agassiz. Transversal section through a radial canal with male gonads, x S5. — Fig. 7. Halopsis ocellata A. .Agassiz. Transversal section through a radial canal with female gonads. Three of the eggs are ready for liberation. X 120. — Fig. S. Halopsis ocellata A. Agassiz. Transverse section through the distal part of a radial canal, free of gonads. Obs. the high development of the entoderm and the narrow lumen, x 240. but sometimes we may find young canals terminating blindly somewhere on the subumbrella (textfigs. 9 f,yj //, k). The points of connection between the radial canals and the circular vessel are, as a rule, not equidistant. The stomach sends out a short conical prolongation along each of the radial canals (Plate IV, figs, i and 5). The lines of attachment of the radial canals to the subumbrella are very narrow (Plate IV, figs, i and 5; textfigs. 6, 7, 8). The gonads (Plate IV, figs, i, 3, 4; textfigs. 6 and 7) are situated along the radial canals, forming a narrow, somewhat folded band on each side of the canal, leaving both ends free. The gonads commence at a distance of 2—7 mm from the peri- phery of the stomach and terminate i—2 mm from the circular vessel. The dorso-ventral extension of the gonadial bands comprises nearly the whole of the lateral walls of the canals, commencing very close to the subumbrella and veutrally leaving but a very narrow line to separate the gonads of the two sides (textfigs. 6 and 7). In the short distal part of the radial canals, free of gonads, the entoderm is highly developed, so that in this part the lumen of the canal is quite narrow (textfig. 8). There is a large number of hollow tentacles (Plate IV, fig. 2), fairly long and very contractile;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
