. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Fig. 42. Harpacticus superflexus. Second maxilliped. The first thoracic foot (p 1) is like that of H. flexus, both rami two-jointed, Ri about as long as the proximal joint of Re; Ri 2 with a claw-like spine and two setse at the end, Ri 1 with distally placed si (Fig. 43); Re 2 ending with three curved claws and a slender seta. In the second thoracic foot (p 2 9) it is to be noted that the middle joint of the inner ramus (Ri 2) has two si, against one si figured for H. chelifer; this duplication of the si was found in t
. Report of the Canadian Arctic Expedition 1913-18. Scientific expeditions. Fig. 42. Harpacticus superflexus. Second maxilliped. The first thoracic foot (p 1) is like that of H. flexus, both rami two-jointed, Ri about as long as the proximal joint of Re; Ri 2 with a claw-like spine and two setse at the end, Ri 1 with distally placed si (Fig. 43); Re 2 ending with three curved claws and a slender seta. In the second thoracic foot (p 2 9) it is to be noted that the middle joint of the inner ramus (Ri 2) has two si, against one si figured for H. chelifer; this duplication of the si was found in two successive preparations on both sides. The third and fourth legs agree with H. Fig. 43. Harpacticus superflexus: Terminal portion of inner ramus of p 1. In the male, the second foot (p 2 (f) has the mucronate process of Ri 2 only a little exceeding the length of Ri 3 (Fig. 44). Fig. 44. Harpacticus superflexus. P 2 Ri of male. In the third foot of the male (p 3 cf), Re 1 is two-thirds the length of Re 2 and Re 3 together, the relative lengths of these joints being'26, 19, 20; the enlarged outer spines of Re 3 are graded as 10, 17, 27; thus Re 3 se 3 is to Re 3 as 27 : 20, the se 3 has usurped the position of the terminal seta (st), so much so that the latter appears to belong to the series of si, of which there are four (in addition to the st); the st has about twice the bulk of the fourth si, but it is flexible, longer and much slenderer than the se 3. In H. chelifer (^ the p3 Re 3 st is rudimentary; in H. uniremis cf it makes a fourth spine. In H. gracilis ^ the st is like that of H. uniremis, but the Se 3 is the shortest of the series. The male of H. flexus is 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 t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1919
