. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Fig. 29. Ectinosoma negledum 9 juv. Front and anterior antenna. The anterior lip (labrum) projects in front of the mouth-parts as an acute recurved hook in both sexes. Two males, from station 40e, measured 0-77 and 0-86 mm. respectively. On the ventral side, the posterior borders of the ab- dominal segments are fringed with delicate spinules, including the pre-anal and anal segments, on which the spinules are smaller. On the dorsal aspect, the posterior borders of Ab 1, Ab 2, Ab 3, and Ab 4 are conspicuously fringed. T
. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Fig. 29. Ectinosoma negledum 9 juv. Front and anterior antenna. The anterior lip (labrum) projects in front of the mouth-parts as an acute recurved hook in both sexes. Two males, from station 40e, measured 0-77 and 0-86 mm. respectively. On the ventral side, the posterior borders of the ab- dominal segments are fringed with delicate spinules, including the pre-anal and anal segments, on which the spinules are smaller. On the dorsal aspect, the posterior borders of Ab 1, Ab 2, Ab 3, and Ab 4 are conspicuously fringed. The urosome of the male consists of six segments: Th 5 and Ab 1-5. The anterior antennae of the male (Fig. 30) are thick and short, with a double protuberance at the back of the third joint. This protuberance is shown as a single tubercle in the figure by Fig. 30. Ectinosoma negledum. Anterior antenna of male, from below. The posterior antennae resemble those of E. sarsi; the Re is 3-jointed with the following relative lengths of the joints: 6, 4, 11; Re 1 carries a distal seta. Re 2 a stronger and longer seta. Re 3 a short setula and two terminal plumose setae, one longer than the other. The mandibular palp likewise resembles that of E. sarsi: a long B2, with a distal group of three setae, carries a terminal one-jointed Re and, at a distance from the latter, a shorter tri-setose 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 Canadian Arctic Expedition (1913-1918). Ottawa, F. A. Acland, Printer to the King
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
